Abstract: RF communications received by a wireless terminal from a servicing base station are used to determine the channel quality such as reported bit error probability (BEP). The RF communications may be in the form of RF bursts that are part of a data frame. An estimated BEP may be determined from the signal to noise ratio (SNR) of the RF bursts and or a sequence of soft decisions extracted from the RF bursts, and their historical performance. The SNR maps to an estimated BEP based upon the modulation format of the RF bursts. The soft decisions decode to produce a data block. When the soft decisions decoded favorably, the re-encoded data block produces a sequence of re-encoded decisions. Comparing the re-encoded decisions to the soft decisions yields a re-encoded bit error (RBER). The reported BEP may be based upon the estimated BEP, RBER, and/or RBER threshold. The RBER threshold may be adaptively incremented or decremented depending upon whether or not the RF communications were properly decoded.

Abstract: The present invention provides techniques to determine an antenna selection and associated weights for a transmission system having multiple antennas. A receiver first samples signals received on each antenna and the channel characteristics for each received signal is calculated. The signal-to-interference-plus-noise (SINR) ratio for various combinations of antennas is estimated using the channel characteristics and a subset of antennas and accompanying weights are determined that can provide an advantageous SINR.

Abstract: A method and apparatus for signal decoding in a diversity reception system with maximum ratio combining are disclosed.

Abstract: The present invention provides a method and system for receiving a plurality of information signals at a receiver. The information signals each traveling through a corresponding transmission channel. The receiver includes a plurality of receiver channels, wherein each receiver channel receives a corresponding information signal. An amplitude of each received information signal associated with each receiver channel is adjusted so the amplitudes of all the received information signals are as great as possible, while still maintaining a target level of signal error of each of the received information signals. The amplitudes of the received information signals can be additionally adjusted so that the signal errors of each of the received information signals are approximately equal. Each receiver channel can be calibrated by measuring a noise reference and a distortion reference for aiding in the estimation of the received information bit stream.

Abstract: A picture quality measurement technique using blockiness provides realtime analysis without the use of a reference signal. A field/frame of an image represented by a processed video signal is captured in a bit-map for analysis. The image is filtered to enhance edges and then correlated with a kernel having a size corresponding to the block size of the compression algorithm used in compressing and decompressing the video signal to produce the processed video signal. The correlation results are processed by comparing an average value with the maximum value to produce a picture quality rating for the processed video signal.

Abstract: A diversity receiver for receiving digital signals has a soft-decision decoder in each of its receiving sections, to provide confidence values for the received decoded digital values, and combines the values from the receiving sections in dependence upon the confidence values. The receiver is especially suitable for use with COFDM, and has two sections, the outputs of which are applied to a soft-decision combiner which combines the signals in dependence upon confidence values received from the demodulators. The output is then applied to a Viterbi decoder. The combining can simply involve switching but preferably involves averaging. Synchronisation and squelching can be provided. The system can be used with frequency diversity, spatial or polarisation diversity, or with antenna pattern diversity, in which case it can constitute an automatic rotator. The system automatically switches between different types of diversity reception, e.g.

Abstract: Systems and methods for intelligently assigning a channel to a device being used by a mobile user in a power controlled, wireless communications system by minimizing the difference between a mobile user's received signal power and the minimum received signal power of a current user on a candidate carrier frequency. Each carrier frequency within a cell is examined to determine whether it has at least one current user assigned to a channel and also has at least one unoccupied channel. For each carrier frequency that meets both of these requirements, a channel quality metric is obtained for each occupied channel. The carrier frequencies are pruned down to a subset of candidate carrier frequencies using the channel quality metrics. Finally, a channel within the set of candidate carrier frequencies is selected by computing a cost function based on the received signal power of the mobile user and the received signal power of each occupied channel.

Abstract: A decision part decides the target value of an SIR (signal to interference ratio) on the basis of the error rate of a reception signal. An SIR determination part determines an SIR regarding the reception signal in a predetermined determination cycle. A detection part detects an unconverged state in which the determined SIR does not converge on the decided target value within a period longer than the determination cycle. A correction part keeps the target value unchanged when no unconverged state is detected, and corrects the target value when the unconverged state is detected. A generation part generates transmission power information on the basis of the determined SIR and the output value of the correction part.

Abstract: A mobile station provides for a more robust reacquisition process with the base station. The mobile station performs an evaluation of the signal conditions from the base station. The mobile station may perform this evaluation at the end of a call, upon release, or immediately after release. If the signal is strong, the mobile station will jump directly back to the synchronization channel. However, if the signal has deteriorated, the mobile station may determine it is more appropriate to reacquire the pilot signal of a base station. The mobile station may also use the signal characteristics to determine whether to perform a full acquisition, a quick acquisition, or a wide acquisition. The mobile station may also use a history to assist in the reacquisition process.

Abstract: A wireless communication device receives audio data from a base station via a radio frequency (RF) communication link (i.e., a forward link) and transmits audio data to the base station via the RF communication link (i.e., a reverse link). The wireless communication device uses the inherent functionality of the reverse link, including an audio input device (120) to determine whether the wireless communication device is operating in a high noise environment. A signal analyzer (124) analyzes the audio signal on the reverse link and determines whether the ambient noise level exceeds predetermined threshold. If so, the signal analyzer (124) activates a filter (126) to filter the audio signal being provided to an audio output transducer (122). Band limiting the audio signal provided to the audio output transducer (122) improves intelligibility of the audio signal in the presence of noise.

Abstract: Embodiments of the present invention relate generally to receivers. One embodiment relates to a digital FM receiver having multiple sensors (e.g. antennas). In one embodiment, the digital receiver includes a baseband unit having a channel processing unit. In one embodiment, the channel processing unit is capable of calculating or estimating a phase difference between the incoming signals prior to combining them. One embodiment uses phase estimation method for diversity combining the signals while another embodiment utlizes a hybrid phase lock loop method. Also, some embodiments of the present invention provide for echo-cancelling after diversity combining. An alternate embodiment of the channel processing unit utilizes a space-time unit to diversity combine and provide echo cancelling for the incoming signals.

Abstract: A communication receiver (400) minimizes a combined local and global mean square error for signal equalization. A base station (101) or a mobile station (102-104) may include a plurality of antennas (292) for receiving a plurality of signals transmitted from a common source. The plurality of signals carry a common stream of data symbols. A pre-processing block (299) processes the received signals to produce a plurality of processed received signals (298). A signal equalizer (401) minimizes a combined local and global MSE over the processed received signals (298) to produce a combined signal (499). A decoder decodes the combined signal (499) to retrieve the stream of data symbols. A processor is configured for combining a local MSE and a global MSE in accordance with an adjustable weighting factor &agr; to produce the combined local and global MSE.

Abstract: A CDMA radio device is provided which is capable of reducing a hardware scale and providing more accurate path selection with low power consumptions. A down-sampling part outputs data of which sampling frequency is made lower than A/D sampling frequency. A correlator part performs correlation calculation of the data using specific spread codes designated in cell information to create a delay profile. A first path selection part selects a path in the delay profile and transfers selection information to an up-sampling part. The up-sampling part supplements delay profile data at sampling time that has been lost in the down-sampling part. A second path selection part transfers some location information of ultimately determined paths to a base station spread demodulation unit or a mobile station spread demodulation unit as a path timing signal.

Abstract: Radio links support signals, representing data blocks composed of symbols, transmitted between base stations and mobile stations by applying a transmission errors protection scheme selected from several specified protection schemes. Some at least of said stations communicate to a control unit measurement values relating to errors observed in the reception of symbols transmitted, and the control unit consults at least one lookup table to adaptively select the protection scheme applied to each radio link as a function of the measurement values communicated in relation to said link. For at least one of the protection schemes, statistical parameters relating to errors observed in the reception of blocks transmitted by applying said protection scheme are estimated. The estimated statistical parameters are processed so as to update the lookup table.

Abstract: A method and apparatus for reducing the number of erred bits in the decoded signal by using a channel decoder whose transfer characteristic is matched to the transfer characteristic of the MIMO detector. This means that the curve of the transfer characteristic of the MIMO detector is 1) above the curve of the reflected transpose of the transfer characteristic of the channel decoder for about 95% of the curve, and 2) close to the reflected transpose of the curve of the transfer characteristic of the channel decoder. Particularly, an LDPCC decoder can be used as the channel decoder and can be matched to the MIMO detector by matching 1) the transfer characteristic of the LDPCC decoder's CND to 2) the transfer characteristic of a combination of the MIMO detector and the LDPCC VND. Furthermore, the LDPCC can be similarly matched to any appropriate detector in addition to or instead of the MIMO detector.

Abstract: A method and apparatus for direct tuning of a component embedded within an integrated circuit includes processing that begins by providing a plurality of frequency dependent control input signals to an input of the integrated circuit. The processing continues for each of the plurality of frequency dependent control input signals by incrementally adjusting the power level of each frequency dependent controlled input signal until the signal strength of an output of the integrated circuit is at a desired signal strength level. The corresponding power level is recorded to produce an adjusted power level for the frequency dependent control input signal. The adjusted power level of each of the plurality of frequency dependent control input signals is plotted to produce a signal strength to frequency relationship. The processing continues by comparing the signal strength to frequency relationship with a desired signal strength to frequency relationship.

Abstract: The power of a signal received on a spatial channel in a wireless radio communications system can be estimated. One embodiment of the invention includes receiving a signal at a plurality of antenna elements, the received signal including a first component from a first radio and a second component from a second radio. Then the contribution of the first component to the received signal may be estimated by calculating a first power estimate for the first radio using the received signal, calculating a second power estimate for the second radio using the received signal, and estimating the contribution of the first component to the received signal, the estimation using the first power estimate and the second power estimate. In one embodiment the first power estimate is an SINR of the first component.

Abstract: To reduce costs in multiple-input multiple-output (MIMO) transmit or receive diversity wireless communications systems an arrangement is described whereby the number of transmit or receive chains can be reduced. Switched antenna selection is used at the transmitter or receiver. Particular advantages are found for nomadic and high speed mobility MIMO user terminals where improvements in capacity are found. In addition improved ability to deal with the effects of spatial fading is achieved. Embodiments using directional antennas in combination with switched selection are also described. These are particularly advantageous for compact user equipment intended for nomadic or mobile use.

Abstract: A scanning antenna diversity system for motor vehicles having at least two antennas mounted in a multi-antenna installation, and connected to a switching logic circuit. The circuit has discrete switching positions, and a reversing position USmax. A receiver is coupled to logic circuitry for receiving a RF signal from one of switching positions or reversing position USmax. There is a diversity processor coupled to and controlled by receiver for producing a derived received signal from the RF signal, with diversity processor cyclically stepping the logic circuitry to another switching position during the presence of receiver interference. There is a maximum level indicator having its input coupled to the antennas, and having its output connected to the controllable logic circuitry for sensing the strongest actual levels of the antenna signals. Level indicator 39 continuously compares the received signals at antennas and activates the logic switching circuit in response to any interference.

Abstract: A diversity receiving apparatus for receiving data that has been primarily modulated and then secondarily modulated includes a plurality of uni-directivity antennas arranged so that they orient in different directions, a signal information detector for detecting signal information of all frequency bands of received signals of each of the uni-directivity antennas, a branch selector for selecting one of received signals of the individual branches received by the uni-directivity antennas, a secondarily modulated data demodulator for demodulating data that has been secondarily modulated as the received signal selected by the branch selector, and a primarily modulated data demodulator for primarily demodulating data that has been primarily modulated as an output signal of the secondarily modulated data demodulator, wherein the branch selector is controlled corresponding to an output signal of the signal information detector.

Abstract: In a system for optimizing television reception by a television receiver receiving a diversity of input signals from a plurality of antennas, one of a plurality of combiners and television tuners selects the strongest combination of input signals for viewing and another scans the various combinations of input signals searching for a combination significantly stronger than the combination being viewed. A plurality of multiplexers selects the output signal of one combiner and transmits the selected signal to one of the tuners. A signal evaluation module evaluates the strength of the combinations of input signals and compares the strength of each combination of input signals to the strength of the viewing signal, looking for a superior signal. A control processor controls the combination of input signals selected by the combiners and the combiner output signal selected by the multiplexers.

Abstract: The transmission system of the present invention is designed to transmit a plurality of signals between the transmitter and the receiver using a plurality of carriers and comprises a radio link characteristics estimator 4 configured to estimate the characteristics of a radio link between the transmitter and the receiver and a carrier quantity determination unit 3 configured to determine the number of carriers according to the result of the estimate by the radio link characteristics estimator 4. The radio link characteristics estimator 4 estimates the characteristics according to an interval in delay time of multipath signals and the number of the multipath signals. The carrier quantity determination unit 3 determines fewer carriers when multipath interference is small, and determines more carriers when the multipath interference is great.

Abstract: Method of obtaining a transmission gain function for an array of antennae communicating to a telecommunication terminal. The method includes determining a first weighting vector {overscore (b)}u maximizing on reception by the array a ratio (C/(Iu+Nu))u of a received signal coming from the telecommunication terminal to a noise plus interference disturbing an uplink channel, and calculating from the first weighting vector {overscore (b)}u a second weighting vector {overscore (b)}d maximizing on reception by the telecommunication terminal a ratio (C/(Id+Nd))d of a received signal coming from the array to a noise plus interference disturbing the downlink channel. The second weighting vector is in the form of a matrix product including a first noise matrix Du which is a function of a power of the first isotropic noise and/or a power of the first directional noise and a second noise matrix Dd which is a function of a power of the second isotropic noise and/or a power of the second directional noise.

Abstract: A satellite receiver is switchable between an operating mode wherein the receiver is capable of generating an output signal using received signals from one or a plurality of satellites, aid another operating mode wherein the receiver generates an output signal using signals received from only one satellite. The former operating mode is useful when the receiver is operating in a mobile environment. The latter operating mode is useful when the receiver is operating in a fixed environment. The receiver is configured to detect the mode in which it is operating. The receiver comprises at least two recevier arms for processing a broadcast signal from a selected one of two satellites. The receiver disables one of the arms when the receiver is stationary.

Abstract: A transmit wave receiving apparatus comprises a wave receiving device, a signal monitoring device and a wave receiving control device. The wave receiving device receives transmit waves, which are transmitted from wave transmitting systems. The signal monitoring device monitors signal levels and signal qualities of the transmit waves, which are received by the wave receiving device. The wave receiving control device controls the wave receiving device so as to halt a wave receiving operation for the transmit wave having a large signal level, when it is judged from monitoring results by the signal monitoring device that the signal qualities of the transmit waves in all of the wave receiving systems are unfavorable.

Abstract: A FM broadcast compander system is combined with a conventional denoising system suited for FM receiver, wherein a noise indicator is determined by a subtraction of the conventionally transmitted difference signal Ud(z) from the additionally transmitted difference signal (Uc(z)) which is additionally transmitted according to the companding system. This system gives a noise reduction of 20 dB in a stereo FM broadcast receiver.

Abstract: An antenna switching apparatus which detects an antenna of good reception with high precision and suppresses control errors in antenna switching. A comparator compares a noise component obtained from a selected antenna with a threshold for noise detection. When noise detection occurs a predetermined number of times within a predetermined time, an antenna switching control unit outputs an antenna switching control signal to switch to another antenna. If all antennas are switched within a predetermined time, a noise switching count analyzing unit outputs a sensitivity control signal, deciding that the threshold should be changed. A noise detection sensitivity setting unit, when supplied with the sensitivity control signal within a predetermined time, increases the threshold to lower the noise detection sensitivity of the comparator.

Abstract: A technique for de-assigning signals from the fingers of a rake receiver is disclosed. In general, embodiments of the present invention place more stringent standards on signals that have been newly assigned to a finger and may be spurious and place less stringent standards on mature signals that have proved themselves over time but may be experiencing only a temporary signal quality shortfall. Illustrative embodiments of the present invention accomplish this goal using one or more of four techniques. The first technique de-assigns a signal from a finger when a measure of signal quality of the signal crosses a threshold, while changing the threshold as a function of the duration that the signal has been assigned to the finger.

Abstract: A radio telephone for communicating in a spreadspectrum communication system having a plurality of radio channels of different frequencies; the radio telephone comprising communication means for establishing over one of said radio channels a communication link over which is communicated data and associated error correction data; a receiver operable to alternatively receive for a period a radio channel other than the established channel and processing means for measuring the radio signal characteristics of the other channel; the processing means being operable to use error correction data received over the established communication link to calculate the contents of the established communication link data of the radio channel signal during the period.

Abstract: The object of the present invention is to insure the communication quality best suited to the type of data between the transmission system and the receiver. In the wireless communication system 1 for controlling the data communication quality between the transmission system 2 to transmit contents and the mobile wireless terminal 8 to receive contents from said transmission system 2 via the predetermined communication path 15, since the transmission system 2 changes the modulation system in the data output unit 13 corresponding to the type of contents to be transmitted to the mobile wireless terminal 8, the data communication quality between said transmission system 2 and the mobile wireless terminal 8 can be controlled. Thereby, the data transmission from the transmission system 2 to the mobile wireless terminal 8 can be executed according to the modulation system best suited to the type of contents holding the predetermined communication quality.

Abstract: A system for selecting an antenna from a diversity of antennas in a DECT, PWT, or TDMA-based antenna selection and switching system is disclosed. When signals are received from a plurality of antennas, the wireless antenna selection and switching system automatically selects either a real-time or a time-delayed signal authentication process. The selected process then selects the antenna that will provide the clearest signal quality.

Abstract: A communications device includes a frequency conversion circuit and a control circuit. An antenna receives a radio signal at a first frequency and converts it into a radio frequency (RF) signal of the first frequency. The frequency conversion circuit is associated with the antenna and configured to convert the RF signal into a first signal component and a second signal component. The first and second signal components occupy a baseband. The control circuit has first ports connected to the frequency conversion circuit to receive the first and second signal components and second ports connected to a processor circuit to output amplified first and second signal components, and separate channels for the first and second signal components existing between the first and second ports. Each channel comprises an amplifier and a feedback loop configured to control the amplifier as a function of a reference signal and a control signal derived from the RF signal.

Abstract: An off-board communications system (50) for railway communications to and from a locomotive (10) and a central station (18). A radio (56) utilizes multiple antennas (52, 54) to broadcast a transmission signal (62, 64) over parallel communications paths so to insure that a data sent from a locomotive (10) is complete. In one embodiment, the antennas (52, 54) are selected to broadcast signals as a function of signal magnitude and phase weighting so to optimize transmissions directed at a remotely located receiver (42). In another embodiment, antennas (92, 94) broadcast at different frequencies, and with different modulation and broadcast protocols. A signal divider (74) such as a multiplexer divides the signal prior to transmission, and a signal recombining unit (84) recombines transmitted signals (80, 82) at the receiving site. A performance/availability checker is employed to monitor transmission integrity.

Abstract: This invention is an application of antenna diversity and two or more multi-channel radios, with a novel cooperative sharing strategy among the multi-channel radios, to aeronautical packet data communications and other communications. It offers the following benefits: enhanced data communications performance in a fading environment; enhanced data communications performance at long range; enhanced data communications performance in the presence of cochannel interference; extendable to an arbitrary number of cooperating peer radios; no single point of failure; no increase in pilot workload or change in operational procedures.

Abstract: A wireless communication system exposes first stage filtered energy estimates to a second stage filter whose length dynamically varies with time. With the second stage filter, it is possible to further suppress noise in low SNR conditions without affecting the overall filtering response time.

Abstract: The quality of a channel for each of a plurality of receive antennas is determined in part by examining data collected during reception of test data. Substantially simultaneously, payload data is also used to evaluate channel quality for at least one antenna. A quality metric calculated for any given antenna is the result of measurements made upon the test and payload data. Parameters used to calculate the quality metric are preferably divided into two sets of non-identical parameters, those based on the test data and those based on the payload data. These parameters preferably include jitter, received signal strength, CRC errors and synchronization errors. By continuously updating quality metrics based on both test and payload data, more reliable assessments can be made of the various antennas being used. As a result, antenna selection is rendered commensurately more reliable thereby improving received signal quality.

Abstract: Techniques for deriving sample timing for multiple signal instances received on multiple antennas for a given propagation path. In one scheme, a DLL is maintained for each path, and each DLL tracks the timing of the best signal instance for the assigned path. In another scheme, a DLL is maintained for each path, and each DLL tracks the average timing of the multiple signal instances for the assigned path. To reduce timing jitter, the SINR of a signal instance may be estimated for a number of different time offsets. The loop filter for the DLL is initially updated in the normal manner. If a change in the time offset used for the sample timing is detected, then the SINRs for the new and prior offsets are compared. The new time offset is used if the associated SINR is better. Otherwise, the prior time offset is retained and used.

Abstract: A mobile radiocommunication terminal includes a first antenna with a first polarization and a second antenna with a second polarization. The antennas are separate and are both used to receive signals. Signals received by the first and second antennas are combined in polarization diversity. Specifically, for each distinct polarization, a Viterbi decoding means outputs the most probable signals and a probability factor associated with the most probable signals. A digital signal processor includes, for each distinct polarization, weighting means that weight the most probable signals by the associated probability factor, and means for summating the signal outputs from the weighting means.

Abstract: A determination part obtains an available communication quality value from required communication quality values of terminals currently on connection, and a maximum permissible communication quality value determined according to a design of the radio communication system, and, when the available communication quality value is larger than a required communication quality value of a new terminal, the determination part accepts connection for the new terminal.

Abstract: A spread spectrum communication system includes a plurality of mobile stations and a plurality of base stations that share the same frequency and operate independently. Each of the base stations can serve as a local base station and a non-local base station and has an element for always transmitting a pilot signal (base station reference signal) at a constant power level. Each of the mobile stations also has a quality measuring element for measuring base station reference signals received from the local base station and an adjacent base station serving as a non-local base station, and a transmission power controlling element for controlling the power level of a signal transmitted from the relevant mobile station corresponding to the measured results in such a manner that when the relevant mobile station has approached the adjacent base station, the transmission power controlling element decreases the power level of the transmission signal.

Abstract: The present invention relates to a base station of a radio system whose antenna means (11) include: means (6 to 8) for receiving signals associated with the same logical channel by at least two antenna beams (1 to 4), measuring means (8) for measuring the signal level of the signals received by the antenna beams, and control means (8) for selecting one or more antenna beams (1 to 4) and for supplying the signals of the selected antenna beam to a receiver unit (5) of the base station (BTS1). In order that the best possible signal would be definitely transmitted to the base station, the base station (BTS1) comprises means for measuring the quality of the signals and for generating a quality signal (BER) and for supplying it to the control means (8), and the control means (8) are arranged to select an antenna beam (1 to 4) on the basis of the signal level measured by the measuring means and the quality signal (BER) supplied to the control means.

Abstract: A communication network system includes a plurality of client computers communicatively coupled to a network, which in turn is coupled to one or more server computers and at least one database. A method for reviewing and tracking workflow tasks, anomalies and other information using the system provides real-time access of the status of tasks and projects on a continuing basis. Individuals interact with the system to provide updates to the status of tasks. The system automatically escalates the completion of an overdue task or anomaly that has failed to be completed within a predetermined time period.

Abstract: A method of evaluating the quality of a radio link in a mobile radiocommunication system from the net bit rate transmitted on the link.

Abstract: A radio apparatus includes a plurality of receiving systems connected to multiple antennas providing diversity, respectively, each receiving system including an antenna terminator and a preamplifier. After one receiving system is discriminated from another receiving system based on radio signals received by the receiving systems, respectively, a controller controls the one receiving system such that an antenna terminator is inactive and a preamplifier is active and, at the same time, further controls the other receiving system such that an antenna terminator is active and a preamplifier is inactive.

Abstract: A processor (206) and a receiver (202) monitor (301) a channel. The processor determines (304, 306) an average received signal quality on the channel and a first derivative of the average received signal quality. The processor then adjusts (308-336) the rate of background scanning to a value determined from an absolute value of the first derivative when the first derivative is positive and the average received signal quality is less than an acquisition threshold, and when the first derivative is negative and the average received signal quality is greater than the acquisition threshold.

Abstract: In a CDMA wireless base station, signals that have been received by a plurality antenna elements of an array antenna on the receiving side are subjected to beam forming by a reception beam former to electrically form a plurality of uplink beams. Reception is carried out based upon the optimum beam (e.g., the beam for which the power is maximum) among the plurality of uplink beams. A transmission beam former for subjecting a transmission signal to beam forming is provided. Based upon whether an uplink reception signal is present or not, a controller performs control so as to carry out downlink beam forming, thereby forming a downlink transmission beam in a direction identical with that of the optimum uplink reception beam, or in such a manner that downlink beam forming is not carried out.

Abstract: In the conventional diversity reception, information included in each non-selected signal does not contribute to an improvement in the reliability of communications, and transmitting power has been dissipated to satisfy required communication quality. Owing to the setting of encoding in respective base stations to injection, signals each including the same contents, which are received by a mobile station, are used for increasing the reliability of communications without depending on the number of the signals which were capable of being received by the mobile station, to thereby reduce transmitting power for satisfying required communication quality.

Abstract: A W-CDMA system having a plurality of antenna sharing apparatuses each having an LNA (Low Noise Amplifier) for receiving a first reception signal for a space diversity from a transmission-reception antenna and separately outputting it to a first and a second paths and a band-pass filter filtering a second reception signal for the space diversity, wherein one antenna sharing apparatus connects a second path of each antenna sharing apparatus to an input terminal of a band-pass filter of a different antenna sharing apparatus in case of increasing a frequency allocation (FA). In case of using a plurality of radio frequency band (FA) in the WLL-CDMA system, the antenna can be shared by a simple cable connection, so that the number of antenna and components required for additionally installing the antenna can be reduced.

Abstract: Apparatus and method are described for selecting for subsequent use an antenna from a plurality of antennas. The selection is biased in favor of the antenna most likely to receive subsequent signals having best signal quality. In a preferred embodiment the signal quality comprises received signal strength.

Abstract: Received channels are grouped into channel groups in which each channel group includes channel members with commensurate signal parameter values to enhance performance of a wireless communications system. A data processing system establishes boundaries of each channel group to achieve an approximately equivalent quality of service (e.g., blocking rate) for each channel group based on the probabilities of occurrence of measured signal parameter values.