Abstract: Techniques are provided for decoding tail-biting convolutional codes by using information within the received data stream that traditionally has not been used or been available to the convolutional decoder, e.g., cyclic redundancy check (CRC) and bit information known by both the transmitter and receiver. Further, a single parallel trace-back is used that reduces implementation complexity. In addition, the least reliable decisions made during forward processing may be reversed in order to generate additional possible codeword candidates. These techniques can be used to reduce false detection rates (FDRs) and/or detection error rates (DERs).

Abstract: Techniques are provided for reducing interference in a wireless network. A user equipment device in a first wireless coverage area of a wireless network using a time division duplex transmission scheme to designate a maximum timing advance value for uplink transmissions based on potential interference between uplink transmissions made by the user equipment device in the first wireless coverage area or at least one other user equipment device in the first wireless coverage area, and downlink transmissions intended for at least one user equipment device in a second wireless coverage area of the wireless network. The maximum timing advance value may be based on relative cell radii or other cell properties of the first and second wireless coverage areas. A base station may determine the maximum timing advance and transmit the maximum timing advance to the user equipment device.

Abstract: Embodiments of techniques for low-cost multimode operation in wireless communications involving the Time Division Synchronous Code Division Multiple Access (TD-SCDMA) standard and the Global System for Mobile telecommunications (GSM) standard are described. In one aspect, a method of multimode operation in a mobile telecommunication device renders wireless communications based on the TD-SCDMA standard using either or both of first and second frequency synthesizers of the mobile telecommunication device. The method also receives signals based on the GSM standard using either or both of the first and second frequency synthesizers of the mobile telecommunication device. Techniques for performing baton handover as well as signal reception for multimedia broadcast and multicast services (MBMS) using two frequency synthesizers are also provided.

Abstract: Embodiments of techniques for low-cost multimode operation in wireless communications involving the Time Division Synchronous Code Division Multiple Access (TD-SCDMA) standard and the Global System for Mobile telecommunications (GSM) standard are described. In one aspect, a method of multimode operation in a mobile telecommunication device renders wireless communications based on the TD-SCDMA standard using either or both of first and second frequency synthesizers of the mobile telecommunication device. The method also receives signals based on the GSM standard using either or both of the first and second frequency synthesizers of the mobile telecommunication device. Techniques for performing baton handover as well as signal reception for multimedia broadcast and multicast services (MBMS) using two frequency synthesizers are also provided.

Abstract: A multi-receiver wireless communication device includes a transmitter, a transmit oscillator communicatively coupled to the transmitter, a receive oscillator communicatively coupled to a first receiver and second receiver, and a switching assembly having a first state in which the receive oscillator is coupled to the first and second receivers and a second state in which the receive oscillator is de-coupled from the second receiver and the transmit oscillator is coupled to the second receiver. The first receiver and the second receiver of the wireless communication device are able to operate independent of one another when the switching assembly is in the second state.

Abstract: A method of updating a multipath search that has located one or more multipath component peaks in a received signal, the method comprising repeating the search using a delay spread window extending either back from the latest peak or forward from the earliest peak.

Abstract: A multi-receiver wireless communication device includes a transmitter, a transmit oscillator communicatively coupled to the transmitter, a receive oscillator communicatively coupled to a first receiver and second receiver, and a switching assembly having a first state in which the receive oscillator is coupled to the first and second receivers and a second state in which the receive oscillator is de-coupled from the second receiver and the transmit oscillator is coupled to the second receiver. The first receiver and the second receiver of the wireless communication device are able to operate independent of one another when the switching assembly is in the second state.

Abstract: A method of improving capacity in a duplexing scheme is provided. The duplexing scheme has a first band of frequencies and a second band of frequencies. The method comprises the steps of: determining an amount of available capacity on the first band of frequencies (steps 402, 404, 410), transmitting, on the first band of frequencies, a variable amount of feedback data corresponding to the amount of available capacity on the first band of frequencies, the feedback data comprising data for improving the quality of communications on the second band of frequencies, and optimizing (steps 406, 408, 412, 414) transmissions on the second band of frequencies using, when available, the feedback data.

Abstract: Antenna weights for a transmit path (3) between two communication devices (1, 2), the first device (1) having an antenna array (4, 5, 6) are generated in the second device (2) and fed back to weighting circuitry (9, 10, 11, 12) in the first device (1). The invention is particularly applicable to multicarrier systems such as OFDM systems. Only weights for those sub-carriers identified as being received with comparatively poor signal quality are calculated and fed back to the first device (1), thus limiting the additional overhead requirements to a minimum.

Abstract: In a method for wireless data communication between a base station and a subscriber unit in a wireless communication system, groups of symbols of an input data stream are commutated to produce a plurality of commutated data streams. The plurality of commutated data streams are then transformed to produce a plurality of transformed data streams. Next, each transformed data stream is spread with a selected one of a plurality of spreading codes to produce a plurality of antenna signals. Finally, each of the plurality of antenna signals is transmitted using a selected one of a plurality of spaced apart antennas, wherein the plurality of spaced apart antennas are spaced apart to provide transmit diversity. In one embodiment, the transform is a space-time transform.