| US 7,486,751 B1 | ||
| Joint time/frequency domain maximum ratio combining architectures for multi input multi output wireless receivers | ||
| Thomas Edward Pare, Jr., Mountain View, Calif. (US); Shuling Feng, San Jose, Calif. (US); and Chien-Cheng Tung, Fremont, Calif. (US) | ||
| Assigned to Ralink Technology, Inc., Cupertino, Calif. (US) | ||
| Filed on Jan. 31, 2005, as Appl. No. 11/48,075. | ||
| Application 11/048075 is a continuation in part of application No. 10/782351, filed on Feb. 18, 2004, granted, now 7,369,626. | ||
| Application 10/782351 is a continuation in part of application No. 10/797299, filed on Mar. 09, 2004, granted, now 7,245,677. | ||
| Int. Cl. H04B 7/10 (2006.01) | ||
| U.S. Cl. 375—347 [375/260; 375/323] | 21 Claims |
| 1. A multi input multi output (MIMO) receiver for receiving signals comprising:
a synchronization (SYNC) module operative to receive a plurality of received baseband signals including orthogonal frequency
division multiplexing (OFDM) modulated signals and time domain complementary code keying (CCK) modulated signals, said SYNC
module being operative to align the OFDM modulated signals, in time domain, to generate aligned OFDM signals and further operative
to generate maximum ratio combining (MRC) parameters said MIMO receiver for processing said plurality of aligned OFDM signals
to generate a plurality of subcarriers;
a time domain CCK MRC module responsive to said MRC parameters for processing said CCK modulated signals in time domain to
generate aligned signals, said aligned signals being combined to generate an adjusted signal for demodulation; and
a frequency domain OFDM MRC module responsive to said plurality of subcarriers for combining the same in the frequency domain
to generate an equalized response for demodulation,
wherein said MIMO receiver for processing said CCK modulated signals in the time domain and said OFDM modulated signals in
the frequency domain to improve reception of said plurality of received baseband signals by selecting the best channel conditions
among the received baseband signals by combining the OFDM modulated signals on the basis of each subcarrier using varying
MRC parameters optimized for each subcarrier.
|