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 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: 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: 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 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.

Abstract: A system and method are provided for direct-conversion of a modulated radio-frequency (RF) signal. After receiving an RF signal, the RF signal is mixed with a plurality of oscillator signals with different phases in an interleaving manner.

Abstract: A multi-mode wireless device having a transceiver including a multi-mode transmitter and a multi-mode receiver. The transmitter can include a multi-mode transmit baseband portion configured to support all of the transmit modes. Similarly, the receiver can include a multi-mode baseband portion that is configured to support all of the receive modes. The transmitter can also include a frequency conversion stage that can convert the output from the transmit baseband portion to the desired transmit frequency. Multiple power amplifiers in parallel, each configured to support one or more of the operating modes, can selectively amplify the transmit signals. The receiver can include multiple low noise amplifiers (LNAs) in parallel, each configured to selectively amplify the received signals of one or more of the operating modes. The output of the LNAs can be coupled to a frequency conversion stage that downconverts the received signals and provides them to the baseband portion.