摘要:
A wireless receiver (301) for receiving multiple space time encoded signals from a plurality of transmit antenna sets (TAT1 through TAT2, and TAT3 through TAT4), wherein the multiple space time encoded signals comprise a set of symbols and wherein each transmit antenna set is coupled to a corresponding encoder (221, 222) at a single transmitter (121). The receiver comprises a plurality of receive antennas (RAT1 through RATQ) and collection circuitry (32), coupled to the plurality of receive antennas, for collecting a plurality of signal samples for a plurality of successive time instances and from each of the plurality of receive antennas. The collected samples comprise samples of multipaths of the space time encoded signals. The receiver also comprises circuitry (34, 36), coupled to the plurality of receive antennas, for determining a linear time invariant multiple-input multiple-output matrix in response to pilot values in the received multiple space time encoded signals. Finally, the receiver comprise circuitry (40, 421, 441) for estimating at least selected ones of the symbols in response to the signal samples and the linear time invariant multiple-input multiple-output matrix.
摘要:
The present disclosure provides a base station transmitter, a user equipment receiver and methods of operating a base station transmitter and a user equipment receiver. In one embodiment, the base station transmitter is for use with a cellular communication system and includes a scheduling unit configured to provide a primary synchronization sequence that is distinguishable from other primary synchronization sequences employed by adjacent base station transmitters located in contiguous communication cells, wherein a primary synchronization sequence structure is based on a reduced computational complexity for identification of the primary synchronization sequence in a user equipment receiver. Additionally, the base station transmitter also includes a transmit unit configured to transmit a primary synchronization signal corresponding to the primary synchronization sequence.
摘要:
Space-time block code with structure of a block STTD. 2×2 blocks allow partial orthogonality for low-complexity detection and optimized diversity gain and coding gain.
摘要:
A wireless receiver for receiving signals from an interference-limited transmitter in an interference-limited system comprising at least one transmit antenna, wherein the signals comprise a plurality of symbols. The receiver comprises a plurality of receive antennas and collection circuitry for collecting a plurality of signal samples with at least one symbol and interference effects. The receiver also comprises suppression circuitry, accumulation circuitry, circuitry for providing estimates of a group of bits, error detection circuitry and circuitry for requesting the transmitter to transmit a retransmission of a packet in response to detecting an error.
摘要:
A method of transmitting a wireless signal (FIGS. 2 and 3A) is disclosed. A data stream (DATA) is received at a first transmitter (210). The data stream is also received by a second transmitter (214) that is remote from the first transmitter. The first transmitter (210) transmits a first part (S1) of the data stream to a remote receiver (220). The second transmitter (214) transmits a second part (S2) of the data stream to the remote receiver (220). The second transmitter (214) is remote from the first transmitter (210).
摘要:
The present invention provides an apparatus, system and method for removal of interference due to multi-path for multiple transmit antennas (hereinafter referred to as MTA-MPIC) for High Speed Downlink Packet Access (HSDPA) encoded for transmit diversity, such as Space-Time Transmit Diversity (STTD). For a single receive antenna, the signal is received (25) and each multi-path delayed signal is demodulated (21). The demodulation can include long code removal and despreading. Subsequently, each demodulated signal is received by the RAKE receiver (22) for determining the channel estimate and channel normalization for the total HSDPA signal, and for computing space-time decoding for the HSDPA signal. Following the space-time decoding, a data decision is made (23). Next, reconstructed interference signals are generated (24) and combined with the received signal (25). For other user signals, an interference estimate is made from the despreader (322) outputs without applying the RAKE/space-time coding operations.
摘要:
A wireless communication network (10) includes a wireless transmitter having a plurality of antennas (AT11, AT12). The transmitter includes for each of a plurality of different user channels (Dn), circuitry (22n) for providing a plurality of groups of symbols in a first symbol group sequence (D1n). Each of the plurality of different user channels includes circuitry (241n) for forming a first modulated symbol group sequence for the user channel by modulating the symbols in the first symbol group sequence with a unique code that corresponds to the user channel and distinguishes the user channel from each other of the plurality of different user channels and circuitry (261) for combining the first modulated symbol group sequences for transmission by a first antenna (AT11). Each of the plurality of different user channels includes circuitry (22n) for forming a second symbol group sequence (D2n) by time reversing symbols in at least some of the groups of symbols.
摘要:
A method of power saving for a wireless transceiver (FIGS. 1 and 2) is disclosed. The transceiver has an active power mode (504) and a reduced power mode (510). The transceiver is operated in the reduced power mode (510) and monitors transmissions from a remote wireless transmitter while in the reduced power mode. The transceiver identifies a transmission from in the remote wireless transmitter by a transceiver identity included in the transmission (FIG. 6, UE identification). The transceiver transitions to the active power mode (512) in response to identifying the transmission.
摘要:
A broadcast/multicast transmission format includes a data portion and a cyclic prefix (CP) coupled to the traffic data portion. A method and system for providing broadcast/multicast transmissions with the application to communication systems that perform broadcast or multicast transmission is also disclosed. The addition of a pilot to the data portion of the transmissions is also disclosed.
摘要:
Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter or a receiver. In one embodiment, the transmitter is for use with a base station and includes a primary module configured to provide a primary synchronization signal. The transmitter also includes a secondary mapping module configured to provide a secondary synchronization signal derived from two sequences taken from a same set of N sequences and indexed by an index pair (S1, S2) with S1 and S2 ranging from zero to N−1, wherein the index pair (S1, S2) is contained in a mapped set of index pairs corresponding to the same set of N sequences that defines a cell identity group. Additionally, the transmitter further includes a transmit module configured to transmit the primary and secondary synchronization signals.