Abstract: Methods and apparatus for post-processing of speech signals are disclosed herein.

Abstract: Methods and apparatus for voice activity detection are disclosed.

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: Processes and apparatus for establishing a secure joint test action group port on a chip are disclosed herein.

Abstract: The embodiments of the present invention relate to the general area of wireless communication systems and, in particular, to channel estimation for joint detection of data signals in TD-SCDMA systems. While time slots and spreading codes separate the users in a TD-SCDMA system, multiple access interference affects all its users. To deal with this problem detection schemes such as joint detection are used, which process all users' signals in parallel and include the interference information from all the users. An important part of the joint detection process is channel estimation and, as such, affects the detection process in different ways. In general, the more accurate the channel estimation is, the better the system performance will be. This invention presents methods and systems for channel estimation of TD-SCDMA systems.

Abstract: A printed circuit board (PCB) including a notch filter, or other suitable filter, is implemented in a communication device for attenuating RFI in transmissions sent from the communication device. The filter includes filter line that runs between at least two conductor layers on the PCB, in a substantially repeating pattern, which maximizes the space available on each conductor layer for additional uses.

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: 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: A method of frequency tracking based on recovered data, for use in an automatic frequency control subsystem at the receiver of a mobile station, is disclosed. The frequency tracking mechanism derives frequency error information from the recovered data to determine the adjustment needed at the mobile station's local voltage controlled oscillator in order to track the frequency of the base station.

Abstract: A system and method for securing a desktop cellular phone, having a SIM card inserted therein, includes turning on the phone and sending first data from a SIM card processor to the phone processor. The phone processor computes second data, using a first algorithm and the first data, and sends the second data to the SIM card processor. Meanwhile, the SIM card processor computes third data using a second algorithm and the first data. The SIM card processor compares the second data to the third data, and determines whether a relationship between the second data and the third data satisfies a first predefined requirement. If it does not, operation of the phone is, at least in part, prevented. Similar steps may additionally, or alternatively, be performed by the phone processor to verify that an authorized SIM card is inserted in the phone.

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: A method of detecting a silent frame at a mobile station in a GSM transmission is disclosed. The method comprises first receiving a data burst intended for the mobile station. Then, a signal-to-interference-and-noise ratio (SINR) is determined for the data burst. If the SINR is below a predetermined threshold, then the data burst is determined as from a silent frame.

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: A method for processing a received signal at a mobile receiver of a wireless communications system is disclosed. The method comprises demodulating the received signal to obtain an analog base band signal and converting the analog base band signal into a digital base band signal. The signal strength of the digital base band signal is estimated and, using the estimation, the digital base band signal is scaled by a scaling factor. The digital base band signal is equalized into an equalized digital signal which is then rescaled by a resealing factor.

Abstract: New PRACH frame structures and methods for implementing such structures for use in mobile communication systems are disclosed. The PRACH frame structures can include a variable-length message portion.

Abstract: New PRACH frame structures and methods for implementing such structures for use in mobile communication systems are disclosed. The PRACH frame structures can include a lengthened message portion. A system can broadcast the PRACH message portion length N in individual cells from a based station. If access condition is satisfied, a user equipment can encode, multiplex and modulate original message bits according to the broadcasted message portion length. The modulated PRACH signals can then be sent to the base station to be demodulated according to the broadcasted message portion length.

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: Systems and methods are provided for displaying messages or other information on the display screen of a telephone, preferably a desktop phone. The messages or other information may be pre-loaded into the phone's memory, such as the nonvolatile, or flash, memory of the phone, or they may be received from a messaging service, or downloaded from the Internet, or from files stored in a computer, or from another suitable source. The messages or other information are preferably displayed when the phone is in standby mode, but they may also be displayed while the phone is in use.

Abstract: A method of frequency estimation for a GSM communications system is disclosed. First, the a frequency control channel data burst is received and downsampled into a plurality of subsets. Then, the subsets are filtered using an auto-regressive filter. The filtered subsets are then correlated and summed to determine a parameter r. The estimated frequency is calculated based upon the parameter r.

Abstract: One of the common channels of the GSM system is the paging channel (PCH) for alerting the mobile station of an incoming call. The PCH message is scattered among four bursts as a result of coding, interleaving, and mapping processes before transmission. It is a waste of power for a handset to turn on and analyze all four bursts if the PCH message is a dummy one. Ideally, a handset needs to be able to make a determination whether a PCH message is a dummy one in as short of a time as possible and, if it is, turn off the power. Embodiments of this invention include methods and apparatus for enabling a handset to make this determination by merely analyzing the first received burst. Since most of the PCH messages are dummy ones, the proposed methods will cause noticeable savings in the power consumption of the GSM handsets.