Abstract:
A transmitting station receives a transmit power command and a reference signal. The transmit power command indicates an increase or decrease in transmission power for the transmitting station. A received power level of the reference signal is measured and the measured reference signal received power level is compared to a transmit power level of the reference signal to produce a pathloss estimate of the reference signal. A size of a change in transmit power level is determined using the pathloss estimate. A transmission power level of the transmitting station is adjusted in response to the transmit power command in an amount of the determined change in size. A communication is transmitted at the adjusted transmission power level.
Abstract:
An uplink signal may be transmitted by a user equipment (UE) in a time interval using an uplink control channel. The uplink signal may include hybrid automatic repeat request (H-ARQ) control information related to received downlink data. If the UE determines that information indicating a coding and modulation is to be transmitted at a same time interval as the H-ARQ control information, the uplink signal may include the information that indicates the coding and modulation.
Abstract:
A sliding window based data estimation is performed. An error is introduced in the data estimation to the communication modeling the relationship between the transmitted and received signals. To compensate for an error in the estimated data, the data that was estimated in a previous sliding window step (58) or terms that would otherwise be truncated as noise are used. These techniques (50, 52, 54, 56. 58, 60, 62 and 64) allow for data to be truncated prior to further processing reducing the data of the window.
Abstract:
The present invention has many aspects. One aspect of the invention is to perform equalization using a sliding window approach. A second aspect reuses information derived for each window for use by a subsequent window. A third aspect utilizes a discrete Fourier transform based approach for the equalization. A fourth aspect relates to handling oversampling of the received signals and channel responses. A fifth aspect relates to handling multiple reception antennas. A sixth embodiment relates to handling both oversampling and multiple reception antennas.
Abstract:
A plurality of communication signals is received. Each communication signal has an associated code. At least two of the communication signals has a different spreading factor. The associated codes have a scrambling code period. A total system response matrix has blocks. Each block has one dimension of a length M and another dimension of a length based on in part M and the spreading factor of each communication. M is based on the scrambling code period. Data of the received plurality of communication signals is received using the constructed system response matrix.
Abstract:
Data is estimated of a plurality of received spread spectrum signals. The plurality of received communications are received in a shared spectrum. The received communications are sampled to produce a received vector. The received vector is processed to produce a plurality of segments (step 50). Each segment is processed separately to estimate data of the received communications (step 54).
Abstract:
K data signals are transmitted over a shared spectrum in a code division access communication system. A combined signal is received and sampled over the shared spectrum (48). The combined signal has the K transmitted data signals (48). A combined channel response matrix is produced (49) using the codes and impulse responses of the K transmitted data signals. A block column of a combined channel correlation matrix is determined using the combined channel response matrix (50). Each block entry of the block column is a K by K matrix (51). At each frequency point k, a K by K matrix is determined by taking the Fourier transform of the block entries of the block column (52). An inverse of a K by K matrix is multiplied to a result of the Fourier transform (52). Alternately, forward substitution (53) and backward substitution (54) can be used to solve the system. An inverse Fourier transform is used to recover the data from the K data signals (55).
Abstract:
A wireless digital communication method for communicating between a base station (12) and a plurality of user equipment mobile terminals (UEs 30) and employs adaptive modulation and coding to achieve improved radio resource utilization and provide optimum data rates for user services. Blocks of downlink (DL) data are received by the base station which requests downlink DL channel quality measurements only from those mobile terminals (30) with pending downlink transmissions. The UEs respond to the request by measuring and reporting DL Channel quality to the base station, which then allocates resources such that the UEs will make best use of radio resources. The base station notifies the UEs of the physical channel allocation indicating the modulation/coding rate and allocated slots followed by transmission of blocks of downlink data which are transmitted to the UEs.