Abstract: A method for post-processing of speech signals includes using a pitch correction filter, a pitch weight parameter adjustor, and a first pitch enhancement filter to process the input signal into a first output signal; summing both the input signal and the first output signal as a second output signal; and using a second pitch enhancement filter to process the second output signal. Furthermore, another method for post-processing of speech signals includes using a second pitch enhancement filter to process the input signal into a second output signal; using a pitch correction filter, a pitch weight parameter adjustor, and a first pitch enhancement filter to process the second output signal into a first output signal; and summing both the second output signal and the first output signal as a final output signal. The two methods can simultaneously realize pitch emphasis and enhancement with low computation complexity.

Abstract: This disclosure is related to a fast motion estimation method for implementing in a video encoder. A particular method includes determining early termination based on the value of a sum of absolute difference (SAD0). The method also includes performing motion prediction using a motion vector from a previous frame as a prediction point. The method further includes using the prediction point as the center to obtain the integral motion vector by conducting a 3×3 cross searching until a minimum sum of absolute difference (minSAD) is located at the center of the cross and predicting a location of a half-pixel point based upon a point corresponding to the integral motion vector, values of the minimum sum of absolute difference of other four cross points.

Abstract: Networking methods of a Single Frequency Network (SFN) in communication systems are disclosed.

Abstract: This disclosure discloses methods and systems for subscribers in a multi-party conversation to obtain the right to speak efficiently and fairly.

Abstract: A networking method of single frequency network in a TD-SCDMA system includes the steps of: (1) deciding a networking configuration scheme by a universal mobile telecommunications system terrestrial radio access network (UTRAN), (2) based on the decided networking configuration scheme, configuring an intra-frequency cell info list information element and an inter-frequency cell info list information element in system information and measurement control messages by the UTRAN, (3) transmitting signals over a servicing area by the UTRAN, and (4) receiving the system information and measurement control messages by a user equipment (UE) from the UTRAN, acquiring working mode configuration information of each frequency and each timeslot of a serving cell and neighboring cells, and judging whether there are duplicated cell information elements in the intra-frequency cell info list information element or the inter-frequency cell info list information element.

Abstract: A mobile TV broadcast system based on TD-SCDMA network is disclosed herein.

Abstract: A method for detecting voice activity comprises pre-processing a first frame in an audio frame sequence, receiving a subsequent frame as a current frame, calculating weighted linear prediction energy of the current frame based on Nth-order linear prediction coefficients, determining whether the current frame contains a noise or speech, if a speech is indicated, performing linear prediction analysis on the current frame to derive new Nth-order linear prediction coefficients and updating the coefficients with the derived one; if a nose is indicated and not the last frame, repeating the calculating and determining process. The corresponding device comprises a component for storing Nth-order linear prediction coefficients, a component for performing linear prediction analysis, a component for computing weighted linear prediction energy and a component for determining whether the current frame contains speech or noise based on calculated weighted linear prediction energy.

Abstract: A method of UU message transfer for fast call setup is disclosed. The method includes encapsulating a Service Request into a RRC Connection Request message. When a UE starts the service sensitive to call setup delays, the RRC Connection Request undergoes non-critical extension. The Service Request and necessary Access Stratum (AS) information are disposed into the extended portion. The RNC, after receiving the extended RRC connection request, extracts the IDT message from the extended RRC Connection Request and sends it to the CN.

Abstract: This invention presents a method for fast call setup in a mobile communication system, including the steps of radio resource control (RRC) connection setup, Non-access stratum (NAS) signaling connection setup and NAS signaling interaction, and radio access bearer (RAB) setup. User equipment (UE) sends a RRC CONNECTION REQUEST, which encapsulates NAS, to RNC. In response, the radio resource control (RNC) digests the RRC CONNECTION REQUEST and forwards NAS to the core network (CN), which sends RAB Assignment Request to RNC and starts to send the paging message to the terminal call.

Abstract: A method of UU message transfer for fast call setup. The method includes encapsulating a Service Request into a RRC Connection Request. When a UE starts the service sensitive to call setup delay, the RRC layer encapsulates the Service Request into IDT. If this encapsulation is successful, the RRC connection request message undergoes non-critical extension, and the encapsulated IDT is disposed into the extended portion. The RNC, after receiving the extended RRC connection request, extracts the IDT message from the extended RRC CONNECTION REQUEST and sends it to the CN.

Abstract: This invention presents a synchronization method for uplink, and is based on UE JT technology. During downlink, UE sets up the downlink synchronization; UE undertakes the downlink channel estimation; UE, according to the estimated downlink channel estimation result, constructs transport matrix A, and the uplink synchronization code matrix d to be transmitted by UE. Then UE obtains the uplink pilot frequency transmission data s, which includes the latest downlink channel fading and multi-path information.

Abstract: This invention discloses a channel estimation method for partial IC in TD-SCDMA intra-frequency cell, Specifically IC or de-correlation multi-user detection is utilized. Partial IC is implemented to realize the joint detection of the channel in several intra-frequency cells. As to n cells, the detailed procedures go as follows: At first, n 2×128 memories are established, just as s1, s2, s3 . . . sn, in order to store the complex serial. Midamble codes of the received signal constitute the 128-chip data. Step 1: The data taken from Midamble codes of the received signals undergo the Partial IC process of the residual past in the first cell. The process of channel estimation in the first cell is undertaken. Afterwards, the received signals of UE from the 1st cell are recovered.

Abstract: A technique is provided for automatic frequency offset correction in a wireless communication system. After demodulating and decoding a received signal in a receiver, channel estimation is also performed. The technique further includes re-encoding and re-modulating the decoded and demodulated signal with a coding and modulation scheme different from the received signal. The signal is reconstructed signal on the basis of the re-encoded and re-modulated signal and estimated channel characteristics. A frequency error is estimated based on the reconstructed signal and the original received signal. A threshold for a comparator is determined on the basis of the estimated offset amount determined by the comparison threshold and the estimated frequency offset.

Abstract: Various embodiments of the present invention adjust an operating mode of a configurable receiver based at least in part on a selected communication service to be provided and an available signal quality. A control unit receives data related to one or more selected communication services to be provided. The control unit also receives information about the environmental operating conditions in which the configurable receiver is operating, via one or more signal quality metrics. The control unit adjusts the operating mode of the configurable receiver by modifying the gain of a received signal, the channel bandwidth, or controlling the synthesizers or equalizers.

Abstract: A simple and efficient method is provided for frequency offset fine estimation. The method comprises: subtracting the QPSK modulation phase of a synchronization code from its received phase to generate the phase drift, and then computing the frequency offset based on the phase drift.

Abstract: A high dynamic range low noise direct conversion transmitter within a multimode apparatus having multiple transmit and receive operating modes is described. The direct conversion transmitter can include a digital baseband coupled to a low noise direct conversion stage. A high dynamic range current folding digital to analog converter can be used to convert the digital baseband signals to analog representations. A wide dynamic range variable gain baseband amplifier couples the baseband signal to the direct conversion stage. A controllable passive attenuation stage operates to provide further gain control. Carrier feedthrough can be substantially eliminated using a carrier feedthrough cancellation loop that selectively utilizes one of a plurality of receivers configured for one of the multiple receive modes.

Abstract: A reconfigurable baseband filter for use in a multimode communication system is disclosed. One or more filter elements can each be configured as a plurality of sub-elements. The value of each of the filter elements can be varied by switching between at least two of the plurality of sub-elements. Switching noise within a desired passband can be reduced by switching at a rate that is greater than the desired passband. The switching noise in the passband can be further reduced by pseudo-randomly switching between the sub-elements. The filter can use a delta-sigma modulator to generate a pseudo-random switching signal.

Abstract: Apparatus and methods for system multiplexing and program element identification is disclosed. A multiplexer generates a sequence of transport packets and associated program element information tables (PEIT). The header of a transport packet carrying the PEIT includes a unique PEIT indicator. A de-multiplexer first locates the PEIT by the unique PEIT indicator in the transport packet header. The de-multiplexer utilizes the corresponding program element identifier (PEID) of the program specific information (PSI) to search for the required transport packet that contains the PSI. The de-multiplexer then locates and extracts the needed elementary streams by searching for the associated PEID in the PEIT. The elementary streams are then sent to decoders for further processing.

Abstract: Midamble codes, acting as channel estimation, and information data, as well as system information, will be sent to the joint cell detector. Midamble codes are sent to the estimator of adjacent cell, as well as that of its own cell. As a matter of fact, channel response is sent to channel noise-depressed modules to be depressed. Then the depressed channel is sent to channel window activation detector to receive first activation detection, to see whether the channel windows are activated. Channel response, after detected by channel window, will be sent to multi-user jointed detection unit together with information data. The soft bit information, after having been demoduled or detected, will be transmitted to the following Transport Channel Decoding (TrCH) modules and Channel Decoding (CC) modules.

Abstract: A method is provided for determining the modulation sequence of the downlink synchronization codes. The method comprises: the method comprises a three step process: step one is to measure the phase of the downlink synchronization code. Step two is to generate an accurate of the phase of the downlink synchronization code by removing the frequency drift effect, step three is to determine whether the sequence S1 or S2 is finally detected. The method allows for high accuracy to be achieved for determination of the modulation sequence of the downlink synchronization codes.