Reduced complexity sliding window based equalizer
First Claim
1. A wireless transmit/receive unit (WTRU) comprising:
- a processor configured to process a received vector using a sliding window based approach;
the processor configured to process windows of response matrix values to produce an estimated data vector such that for each window;
a non-Toeplitz channel response matrix is transformed into a Toeplitz matrix;
the Toeplitz matrix is transformed into a circulant channel response matrix; and
the circulant channel response matrix is used in a discrete Fourier transform based approach to estimate a data vector corresponding to the window; and
a summer configured to combine the data vector estimated in each window to form a combined data vector.
0 Assignments
0 Petitions
Accused Products
Abstract
Data estimation is performed in a wireless communication system using both oversampling and multiple reception antennas. A receive vector is produced for each antenna at a sampling interval which is a multiple of the chip rate of the received signal. A channel response matrix is produced for each antenna at a preferred multiple of the sampling rate. Each receive vector is processed using a sliding window based approach, where a plurality of successive windows are processed. For each window, a combined circulant channel response matrix is produced using the channel response matrices. Using the combined circulant channel response matrix and a combined received vector comprising each received vector in a discrete Fourier transform based approach to estimate a data vector corresponding to that window; and combining the data vector estimated in each window to form a combined data vector.
-
Citations
16 Claims
-
1. A wireless transmit/receive unit (WTRU) comprising:
-
a processor configured to process a received vector using a sliding window based approach; the processor configured to process windows of response matrix values to produce an estimated data vector such that for each window; a non-Toeplitz channel response matrix is transformed into a Toeplitz matrix; the Toeplitz matrix is transformed into a circulant channel response matrix; and the circulant channel response matrix is used in a discrete Fourier transform based approach to estimate a data vector corresponding to the window; and a summer configured to combine the data vector estimated in each window to form a combined data vector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A wireless transmit/receive unit (WTRU) comprising:
-
a plurality of receive antennas; a sampling device configured to sample wireless signals received on each antenna at a multiple of a signal chip rate and to produce a received vector at the sampling rate for each receive antenna; a processing circuit configured to produce a channel response matrix for each antenna; the processing circuit configured to process each received vector using a sliding window based approach, where a plurality of successive windows are processed; the processing circuit configured to process each window of the plurality of windows; to produce a combined circulant channel response matrix using the channel response matrices; and to use the combined circulant channel response matrix and a combined received vector comprising each received vector in a discrete Fourier transform based approach for estimating a data vector corresponding to that window; and the processing circuit configured to combine the data vector estimated in each window to form a combined data vector. - View Dependent Claims (13, 14, 15, 16)
-
Specification