Abstract: Circuitry for use in aligning bytes in a serial data signal (e.g., with deserializer circuitry that operates in part in response to a byte rate clock signal) includes a multistage shift register for shifting the serial data signal through a number of stages at least equal to (and in many cases, preferably more than) the number of bits in a byte. The output signal of any shift register stage can be selected as the output of this “bit slipping” circuitry so that any number of bits over a fairly wide range can be “slipped” to produce or help produce appropriately aligned bytes. The disclosed bit slipping circuitry is alternatively or additionally usable in helping to align (“deskew”) two or more serial data signals that are received via separate communication channels.

Abstract: A modem and a method of placing a modem in an online data state. In one embodiment, the modem includes: (1) a digital interface configured to receive, via an AT channel thereof, a standard AT command directing an AT channel of the modem to exit a command state and enter an online data state and (2) a command processor coupled to the digital interface and configured to: extract channel designation data received as a standard parameter of the standard AT command, cause a channel designated by the channel designation data and separate from the AT channel to enter the online data state, and allow the AT channel to remain in the command state.

Abstract: A signal processing method, device, and system are provided. The method includes: sending, through a first user port, a crosstalk detection signal in a connected line, and receiving, through a second user port, an error sample of an actual downlink signal fed back by a terminal side in a connected line; and estimating, according to the actual downlink signal and the crosstalk detection signal, a coefficient of a pre-coder of a DSLAM to obtain an estimated coefficient of the pre-coder, where the coefficient of the pre-coder is used to cancel far-end crosstalk on the line connected to the second user port when the first user port sends an SELT signal.

Abstract: A network node of a synchronous network, wherein said network node comprises a timing circuit which recovers a reference clock from a reception signal received by said network node from an upstream network node of said synchronous network and uses the recovered reference clock for a transmission signal transmitted by said network node to a downstream network node of said synchronous network; and a clock stability monitoring circuit which monitors internal control parameters (CP) of said timing circuit to detect an instability of the reference clock distributed within said synchronous network.

Abstract: A method for adaptive communication in an HF frequency band includes at least one of the following steps: the determination of a payload subband S that is available for a transmission in the HF band, the selection in the payload subband S of a set of n frequency channels of identical width according to a frequency allocation plan and the quality of the link of each of said channels, or the simultaneous transmission on the n frequency channels of a signal complying with an HF waveform.

Abstract: An achievable sum data rate with respect to each of available candidate transmission/reception modes may be calculated to select a transmission/reception mode of transmission/reception pairs repeatedly using radio resources. A transmission/reception mode to be applied may be selected from the candidate transmission/reception modes based on the calculated sum data rate. Information associated with the selected transmission/reception mode may be shared by the transmission/reception pairs.

Abstract: A receiver is provided that receives signals from a device under test (DUT) for one or more modes of operation. For each mode, the system detects beacon transmission signals from the DUT, and counts the number of beacons for a period of time. If the count is not consistent with an expected count, e.g. a stored value, the system may preferably provide an output to indicate that there is a problem with the DUT. If the count is consistent with the expected count, the system may preferably perform further testing for other modes of operation. If the count output of the DUT is consistent with expected counts over each of the operation modes, the system may provide an indication that the DUT has passed the beacon tests.

Abstract: A method for partitioning a communications network includes selecting, by a controller, a starting communications controller for a first region in the communications network according to an interference level. The method also includes including, by the controller, a first neighboring communications controller in the first region if an average inter-cell interference level of the starting communications controller and the first neighboring communications controller exceeds a first threshold and closing the first region if the average inter-cell interference level of the starting communications controller and the first neighboring communications controller fails to exceed the first threshold. The method further includes storing information about the first region in a memory.

Abstract: The present invention relates to a transmitter in a transmission system operable to optimize estimates of a quantity at a receiver for improved operation. The transmission system includes a transmitting unit connected to a number of antennas (Txm), and to control unit. The control unit controls the transmitting unit to initially transmit an initial training/quantity estimation sequence during an initial training/quantity estimation phase and subsequently transmit a sequence of data symbols such that the information rate of the data symbols is progressively increased.

Abstract: An apparatus and a system for automatically tracking data speed are disclosed. An embodiment of the invention provides a transmitting apparatus for automatically tracking data speed that includes: an encoder configured to convert parallelized input data according to a preset signal rule into a first signal and a second signal, where the input data is inputted as a unit of n bits, the encoder outputs the first signal and the second signal such that, if the input data includes identical bit values consecutively, one of the first signal and the second signal is converted to include transition information instead of following a differential rule with respect to the other signal; a serializer configured to serialize the first signal and the second signal; and a transmitting part configured to transmit the serialized first signal and second signal.

Abstract: To improve throughput by reducing the resource used for transmitting a parameter relating to retransmission control and decreasing overhead of retransmission control signaling. Where a retransmission control method is employed with adaptive MCS control in which the encoding rate can be changed, the scheduling section sets the MCS in accordance with CQI notified from the communication counterpart apparatus. When transmission data is encoded, the RV parameter bit-number setting section sets the number of bits used for signaling the RV parameter to decrease as the encoding rate of the first transmission is decreased and sets the RV parameter based on the number of bits. For example, in a case where the encoding rate R is R>?, two bits are set. In a case where the encoding rate ?<R??, one bit is set. On the other hand, in a case where R??, zero bits is set.

Abstract: A timing jitter measurement circuit for measuring timing jitter in the digital domain may use an interpolator bank to over-sample a signal from a media reader, a zero crossing estimator to estimate a zero crossing moment in the output of the interpolator bank and a time interval analyzer (TIA) to calculate the timing jitter as the deviation of the estimated zero crossing moment from an expected zero crossing moment in a clock signal. The timing jitter measurement circuit may be integrated into digital circuitry since it avoids using analog devices. Consequently, it may simplify the chip design, lower power consumption and save space.

Abstract: A radio resource control method of controlling a radio resource for transmitting user data by a mobile station via an uplink, including: sending, from a radio base station, a signal indicative of a reduction of a maximum allowable transmission rate of the user data signaled to the mobile station connected to the radio base station, to a radio network controller; and controlling, at the radio network controller, the radio resource based on the reported signal indicative of the reduction of the maximum allowable transmission rate.

Abstract: A method for detecting an ingress of a short wave radio signal in a power line communication system which determines a strength of a common mode signal at a frequency of the power line communication system during a time period when no communication in the power line communication system at this frequency takes place and an ingress is detected if the strength of the common mode signal is above a determined threshold. A corresponding power line communication modem can implement such a method.

Abstract: Disclosed are a self-adaptive baud rate system and method. The method includes: a) receiving first data and second data; b) judging whether or not a falling edge of a start bit in a synchronization code of the first data and second data is detected; c) if the falling edge is not detected, then return to step b); and if the falling edge is detected, then a first counting is started from a rising edge after the start bit based on a reference clock, and stopped at the next falling edge, and a first count value is obtained; and a second counting is started from the falling edge where the first counting was stopped, and stopped at the next rising edge, and a second count value is obtained; and d) acquiring a baud rate according to the relationships among the first count value and the second count value and a first threshold.

Abstract: A device may include one or more components and a processor. The one or more components may obtain bit-error-rates of a signal and signal-to-noise ratios of the signal. The processor may select a target signal-to-noise ratio for the signal, determine a target noise level based on the target signal-to-noise ratio, set a noise level of the signal to the target noise level, determine a signal-to-noise ratio of the signal via the one or more components, adjust the noise level of the signal based on the determined signal-to-noise ratio, to stabilize the signal-to-noise ratio, determine a bit-error-rate of the signal via the one or more components, and record the bit-error-rate.

Abstract: Using DSL modems as data collectors, the modems processes the data to, for example, allow easier interpretation of the line characteristics. In particular, the modems postprocess the data including calibration, filter compensation, determination of the SNR medley from the bits and gains tables and rate conversion. The interpretation process uses the postprocessed data and determines loop characterization, interferer detection, a data reduction estimation and a data rate estimation. The outputs of these determinations least allow for the characterization of the line conditions between the two modems.

Abstract: A method in a wireless communication system having a forward channel corresponding to transmissions from a first device to a second device, and a reverse channel corresponding to transmissions from the second device to the first device, includes initiating, at the first device, a first update of a steering matrix. The steering matrix is used to beamform transmissions on the forward channel. The method also includes monitoring, at the first device, a plurality of reverse channel estimates corresponding to the reverse channel, determining, at the first device, a metric indicative of a rate of change in the reverse channel based on the plurality of reverse channel estimates, and initiating, at the first device, a second update of the steering matrix based on a comparison between (i) the metric indicative of the rate of change in the reverse channel and (ii) a threshold.

Abstract: A data transmission method includes, in the mobile station apparatus, selecting a PMI and an RI corresponding to an Hermitian transpose of a channel matrix indicative of channel characteristics and calculating a CQI from the PMI. The method further includes transmitting the PMI, the RI, and the CQI to the base station apparatus as feedback information. The method further includes, in the base station apparatus, calculating a first data rate of a case of performing SU-MIMO transmission based on the PMI transmitted from the mobile station apparatus as feedback and calculating a second data rate of a case of performing ZF MU-MIMO transmission based on the PMI. The method further includes selecting a transmission scheme corresponding to a higher data rate between the first and second data rates.

Abstract: A method and a device adjust a power allocation of users in a digital subscriber line environment. An intermediate power allocation is determined for at least one user initializing with the digital subscriber line environment based on a new power allocation determined for the digital subscriber line environment containing the at least one user. The intermediate power allocation provides a predefined minimum signal-to-noise ratio margin for the active users of the digital subscriber line environment. Furthermore, a communication system can contain such a device.

Abstract: A method of power line communications includes obtaining timing information for an AC mains signal transmitted on a power line in a power line communication (PLC) system that includes at least one receiver and at least one other device connected on the power line which provides variable loading during cycles of the AC mains signal. A first loading interval within at least a first cycle of the cycles having lower loading and at least a second loading interval within said first cycle having higher loading are identified using the timing information. At least one data packet is transmitted only during the first loading interval over the power line to the receiver.

Abstract: A signal on a transmitter tracks noise on a ground node in a manner decoupled from a positive node of a power supply. The signal is transmitted from the transmitter to the receiver. A reference voltage is generated on the receiver to track noise on a ground node in the receiver. Consequently, the received signal and the reference voltage have substantially the same noise characteristics, which become common mode noise that can be cancelled out when these two signals are compared against each other. In a further embodiment, the reference voltage is compared against a predetermined calibration pattern. An error signal is generated based on a difference between the sampler output and the predetermined calibration pattern. The error signal is then used to adjust the reference voltage so that the DC level of the reference voltage is positioned substantially in the middle of the received signal.

Abstract: A method includes receiving reference signals in a mobile communication terminal, which is designed to receive data-carrying signals that are transmitted from a base station using one of multiple predefined Modulation and Coding Schemes (MCSs). One or more pre-calculated mappings between Signal-to-Noise Ratio (SNR) and error rate for one or more of the MCSs are held in the communication terminal. The pre-calculated mappings are adjusted according to one or more transmission parameters of the data-carrying signals. Measures indicative of respective actual spectral efficiencies that are achievable by the MCSs are estimated based on the adjusted mappings using the received reference signals. A preferred MCS is selected based on the estimated measures, and feedback that is indicative of the preferred MCS is sent to the base station.

Abstract: A prequalification determination is made on a DSL line to predict the bit rate improvement that might be accomplished by implementation of vectoring, providing information to use in determining whether or not to implement vectoring. Overall noise is measured on the line, along with FEXT noise, and the FEXT noise is subtracted from the overall noise, and the resulting value is employed to determine a predicted bit rate, providing an indication of the potential bit rate if vectoring is implemented.

Abstract: Systems and methods are disclosed for receivers of transmit chains of a MIMO system to receive transmit power information and to compute channel characteristics of the transmit chains to enable dynamic adjustment of the transmit power on the transmit chain to optimize an overall data throughput while meeting a maximum emission limit, such as a regulatory limit on emitted power. The transmit power and the data rate on the transmit chains may be independently controlled. The receiver of the MIMO system may determine the new transmit power for the transmit chains from the computed channel characteristics and the current transmit power of the transmit chains. Alternatively, the receiver may transmit the computed channel characteristics of the transmit chains to the transmitter for the transmitter to determine the new transmit power for the transmit chains. The transmitter may use the new transmit power to transmit new data on the transmit chains.

Abstract: A symbol rate detection apparatus includes an analog-to-digital converter (ADC), a coarse detection module, a mixer, a down-sampling module, and a fine detection module. The ADC converts an analog input signal to a digital input signal at an original sampling frequency. The coarse detection module estimates a carrier frequency offset and a coarse symbol rate according to the digital input signal. The mixer adjusts the frequency of the digital input signal according to the carrier frequency offset to generate a frequency-compensated signal. The fine detection module determines a fine symbol rate according to the frequency-compensated signal.

Abstract: Aspects of a method and system for redundancy-based decoding of video content are provided. A bit sequence comprising video content may be decoded in a multilayer process based on a decoding algorithm and at least one physical constraint. The decoding algorithm may be based on the Viterbi algorithm. Whether the bit sequence comprises video content may be determined based on information provided by a portion of a packet header or by packet priority information necessary for enabling quality of service applications. The physical constraint may be based on border, DC component, and/or low frequency continuity between neighboring discrete cosine transform (DCT) blocks. The physical constraint may also be based on the consistency of video data coded by a variable length coding (VLC) operation. At least one physical constraint test may be performed on selected estimated video bit sequences to select a decoded output video bit sequence.

Abstract: A method and apparatus of accessing a channel in a wireless communication system is provided. The method includes receiving a first frame including configuration information on a channel allocated from a bandwidth including a primary channel, a secondary channel and an extension channel from an access point (AP), and transmitting a second frame to the AP by using the allocated channel. The configuration information includes an extension channel offset element field that sets the extension channel as the offset of the primary channel.

Abstract: Transmission power relative to a propagation path having a variation in gain is controlled to increase communication channel capacity, and a data rate is controlled in accordance with the variation of the increased communication channel capacity. In order to increase the communication channel capacity, the transmission power is determined so that the sum of noise power (=received noise power/propagation path gain) converted into one at a transmitter and the transmission power becomes constant. As a result, contrary to the background art, the transmission power is controlled to be reduced when the propagation path gain decreases and to be increased when the propagation path gain increases.

Abstract: A method for testing data packet reception characteristics, such as sensitivity and throughput, of a data packet signal transceiver. By monitoring responsive data packet signals returning from a device under test (DUT), it can be determined whether and when the DUT has successfully received valid data packets, received faulty data packets, received valid data packets in a faulty manner, or not received valid data packets. When any of such events are detected, the stimulus data packet signals can be provided in such a manner as to determine whether possible DUT reception problems are related to power level, duration or data rate of the stimulus data packet signals, or to circuitry within DUT without requiring external controls over or querying of the DUT.

Abstract: The determination and identification of channels in a signal is an important aspect of the operation of a signal receiver. A method (800) is described including the steps receiving (802) a signal containing a plurality of channels, filtering (806) the signal to produce an indicator of a channel band edge, and determining (818) a characteristic of the channel based on the indicator. Additionally, an apparatus (300) is described including a spectrum shift circuit (304) that receives an input signal and shifts the frequency spectrum of the signal, a filter (306) that filters the frequency shifted signal to produce an indicator of a band edge of a channel, and a signal analysis circuit (316, 318) that determines a characteristic of the channel based on the indicator of the band edge, the signal analysis circuit (316, 318) controlling the frequency shift in the spectrum shift circuit (304) based on the determined characteristic of the channel.

Abstract: Systems and methods for decreasing the amount of information sent on a feedback channel are disclosed. Spectral binning and/or a Markov state model may be used to reduce the amount of information sent on the feedback channel.

Abstract: Systems and methods of intelligent policy enforcement in access networks are disclosed. One such method is implemented in a network device and comprises updating a traffic history with information associated with an incoming packet arriving from or destined to a subscriber link. The method also comprises calculating a drop probability for a next traffic instant and predicting a traffic rate for each of a plurality of flows on the subscriber link. The method also comprises determining whether the incoming packet conforms to a traffic policy associated with the incoming packet. The method also comprises determining whether surplus bandwidth is available on the subscriber link. The method also comprises forwarding the packet responsive to the determination that the incoming packet does not conform and that surplus bandwidth is available.

Abstract: Prediction of a channel capacity is accomplished based on a TDR echo without explicitly estimating the topology of the line. The prediction is based on obtaining a measured TDR echo, determining a theoretical TDR echo for a plurality of loop lengths, estimating the equivalent TDR length based on an optimization, updating the equivalent TDR length and utilizing the updated TDR length to predict one or more of the upstream and downstream data rates.

Abstract: A data receiver circuit for converting received serial data into parallel data in accordance with a data rate signal and for outputting the converted parallel data, the data receiver circuit includes a clock generator for generating a reference clock based on an input clock, a data latch for latching the received serial data and outputting first latched serial data in accordance with the reference clock, a first data output section for converting the first latched serial data into first parallel data with a first reference clock, in case that the data rate signal indicates a first data rate same as a data rate of the reference clock, and a second data output section for converting the first latched serial data into second parallel data with a second reference clock, in case that the data rate signal indicates a second data rate slower than the data rate of the reference clock.

Abstract: A method for measuring the asymmetric delay of a communication path includes: sending, by a first node, a first delay measurement message to a second node whose local clock is synchronized with the first node; receiving, by the first node, a second delay measurement message sent by the second node; calculating, according to time when the first delay measurement message is sent by the first node and time when the second node receives the first measurement message, a communication path delay in a direction towards the second node; calculating, according to time when the second node sends the second delay measurement message and time when the second measurement message is received by the first node, a communication path delay in a direction leaving the second node; and obtaining a measured value of the asymmetric delay of the communication path according to the communication path delays in the two directions.

Abstract: In a signal measurement device, a plurality of mixers output a signal having a frequency equal to a difference between two input frequencies, and a single local signal source feeds a common local signal input to the plurality of mixers. A difference measurement unit measures a level and a phase difference between outputs of the plurality of mixers if a common correction signal input is fed to the plurality of mixers, and a level/phase measurement unit measures the level and the phase of the output of the plurality of mixers if inputs of signal to be measured common in frequency are fed to the plurality of mixers. A difference correction unit corrects a measurement result of the level/phase measurement unit based on a measurement result of the difference measurement unit if a common input of signal to be measured is fed to the plurality of mixers.

Abstract: In a wireless communication system performing wireless communication via a wireless transmission path, a first wireless communication apparatus includes a receiver that receives a wireless signal via a wireless transmission path, a disconnection detector that detects disconnection of a wireless line connected to a second communication apparatus, a modulation controller that selects a modulation scheme, enabling communication under poor conditions in a transmission path, rather than a modulation scheme which has been used in wireless communication, and a transmitter that notifies the modulation scheme selected by the modulation scheme controller to the second wireless communication apparatus. The second wireless communication apparatus includes a receiver that receives the selected modulation scheme from the first wireless communication apparatus, and a transmitter that transmits signals to the first wireless communication apparatus based on the selected modulation scheme which is received by the receiver.

Abstract: A modem or associated computing or testing device is configured to detect the presence of one or more faults that affect DSL communications, and upon their detection, generate, for example, an indication, communication or message that recommends corrective action. In this context, a fault is generally caused by one or more unfiltered devices, impulsive noises, malfunctioning modems, or other factor that does not affect measured attenuation or measured noise, but does affect the signal-to-noise ratio (SNR) of the link. In addition to being able to generate a message guiding a user through corrective action, the system can estimate the rate impact of the detected fault.

Abstract: An antenna can be in a computing device. A connector can be in the computing device and adjacent to the antenna for a wired connection. In one implementation the antenna is connector to a controller to monitor the antenna for wireless signal degradation and compensate for the wireless signal degradation.

Abstract: A multimedia information receiving apparatus receives multimedia information which is transmitted by a broadcast system and receives multimedia information which is simultaneously transmitted by another transmission system such as IP communications, and generates one received information by selecting elements having a few errors from elements of demodulated broadcast system information and elements of demodulated other transmission system information and then arranging the selected elements.

Abstract: A signal generating device has a display, central processing unit and a waveform generating circuit. The central processing unit generates a user interface on the display for setting parameters for a serial data pattern and a parameter for an intersymbol interference and a bandwidth extension pre-emphasis effect on the serial data pattern. A waveform record file is generated using the serial data pattern parameters and the intersymbol interference effect and bandwidth extension pre-emphasis effect parameter. A waveform generation circuit receives the waveform record file and generates a serial data pattern analog output signal having the intersymbol interference effect or the bandwidth extension pre-emphasis effects defined by the intersymbol interference and bandwidth extension pre-emphasis effect parameter.

Abstract: A communication medium determining apparatus determines a communication medium in use for communication between two devices on a network. The apparatus includes a communication performance obtaining unit which obtains values indicating transmission speeds in a given communication path when a device which decreases transmission speed in a specific communication medium when activated, is active and when the device is inactive. The apparatus further includes a communication medium determining unit which determines whether or not the communication through the given communication path is performed using the specific communication medium. This determination is based on a speed decrease value indicating a decrease amount of the transmission speed in the specific communication medium caused by activation of the device, and a speed difference value which is a difference in the transmission speed obtained by the communication performance obtaining unit between when the device is active and when the device is inactive.

Abstract: To detect a special burst sequence, a cross correlation (C) is compared to a square root of an estimated noise variance (?) in conjunction with a threshold value (Th). In one aspect of the disclosure, the threshold value may include multiple threshold values. The multiple threshold values may be compared to an intensity or level of a special burst metric (C/?) to facilitate determination of the special burst sequence. For example, when a special burst metric C/? is greater than a second threshold value (Th2) it may be determined that a special burst sequence exists. However, when the special burst metric C/? is greater than a first threshold value (Th1), but less than the second threshold metric (Th2), it may be determined that detection of a special burst is unclear. In this case, a TFCI value may be used to confirm whether a special burst is detected.

Abstract: A forecast model processes performance data from a site, e.g., a cable modem termination system (CMTS), to obtain a set of concurrency equations for existing speed tiers that is based on an observed subscriber bandwidth for the site. A new set of concurrency equations is obtained for new speed tiers so that a new subscriber bandwidth can be predicted for the new speed tiers. Based on the new subscriber bandwidth, expected subscriber growth, and changes in data consumption, the site is reconfigured with additional ports based on the forecast. This process can be repeated for the other sites. Sites may be grouped together based on the observed subscriber bandwidth. A new subscriber bandwidth may be predicted for the group with the new speed tiers so that additional ports can be configured for each of the sites in the group.

Abstract: A method and device for reducing interference between a first signal of the carrier current type (Se) transmitted between modems (MCPL) in an electrical network (Re) and a second signal (S) transmitted between modems (M) in another network (R), the signals (Se, S) being coded by distribution of the data over allocated carrier frequencies in the same reserved frequency band (BF). The method includes: a step of measurement, by each modem (MCPL) in the electrical network, of transmission characteristics of each carrier frequency (F) that may be used for coding the first signal (Se), a step of detection, by analysis of the measured transmission characteristics, of at least one second carrier frequency (F2,n), which is allocated or may be allocated for coding the second signal (S) and is common with at least one first carrier frequency (F1,m), which is allocated for coding the first signal (Se), and a step of optimisation of the distribution of the data of the first signal (Se) over carrier frequencies.

Abstract: A method and apparatus for determining and displaying the throughput rate of a modem that includes a first housing, first circuitry disposed within the first housing for demodulating data received by the modem and modulating data transmitted by the modem, and a first port for outputting demodulated data from the modem and inputting data to the modem for modulating. A counting device is connected between the modem and connected equipment. The counting device includes second circuitry for monitoring traffic between second and third ports and generating the throughput rate in accordance with the monitoring. The counting device displays an indication of the throughput rate to a user of the connected equipment.

Abstract: A method includes receiving reference signals in a mobile communication terminal, which is designed to receive data-carrying signals that are transmitted from a base station using one of multiple predefined Modulation and Coding Schemes (MCSs). One or more pre-calculated mappings between Signal-to-Noise Ratio (SNR) and error rate for one or more of the MCSs are held in the communication terminal. The pre-calculated mappings are adjusted according to one or more transmission parameters of the data-carrying signals. Measures indicative of respective actual spectral efficiencies that are achievable by the MCSs are estimated based on the adjusted mappings using the received reference signals. A preferred MCS is selected based on the estimated measures, and feedback that is indicative of the preferred MCS is sent to the base station.

Abstract: The present invention relates to a communication system comprising a transmitter and receiver in communication for transmitting signals through one or more communications channels, wherein at least one of the transmitter and the receiver each comprise a quality measure, which contributes to an overall quality measure for the system and wherein the or each communications channel comprises a plurality of sub-bands between at least two nodes, wherein the plurality of sub-bands each having a specific maximum power spectral densities (PSDs) and wherein one or more sub-bands between the transmitter and the receiver are identified as having a higher maximum PSD than other sub-bands and wherein the PSD of the one or more identified sub-bands is reduced in a predetermined manner to thereby increase the overall quality measure for the system.

Abstract: A system and method for calibrating a local radio reference clock for a radio operating in a radio network having a network reference clock. The method comprises determining at the radio an offset between the local clock and the network clock, placing the local clock in a calibration mode, and calibrating the local clock using a radio link to reduce the offset.