Mimo ofdm system
AssigneeAT&T Intellectual Property II, L.P.
InventorsYe Li, Nelson Ray Sollenberger, Jack Harriman Winters
Life of this patent
Estimating the term…
Abstract
A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.
Claims3
A receiver comprising:
- N antennas;
- a computing block for processing a plurality of signals concurrently transmitted from a transmitting unit that pertain to m blocks of data;
- N Fast Fourier Transform (FFT) elements, each coupling a different one of said N antenna to said computing block;
- m space-time decoders responsive to said computing block, each arriving at a best estimate of a different one of said m blocks of data;
- and
- a channel parameter estimator responsive to output signals of said N FFT elements and to developed best estimates of said blocks of data from said m space-time decoders, providing parameters to said m space-time decoders.
Dependencies are inferred from the claim text.