Carrier recovery architectures for multi input multi output...

Details Carrier recovery architectures for multi input multi output... Carrier recovery architectures for multi input multi output...

2005-03-07

2009-06-09

Kim, Kevin Y (Department: 2611)

Pulse or digital communications

Receivers

Automatic frequency control

Reexamination Certificate

active

07545891

ABSTRACT:
A modem system for transmitting and receiving signals having a frequency domain equalizer (FEQ) being responsive to a plurality of received data symbols for processing the same to generate one or more equalized data symbols, said modem system being responsive to a plurality of received baseband signals for processing the same to generate said plurality of received data symbols, said plurality of received data symbols for including one or more sets of pilot tones, said FEQ for processing said sets of pilot tones to generate one or more sets of equalized sets of pilot tones, in accordance with an embodiment of the present invention. The modem system further includes a frequency offset detection module being responsive to said sets of equalized pilot tones to generate one or more instantaneous carrier offsets, said modem system for processing said instantaneous carrier offsets to generate one or more frequency corrections for applying the same to said plurality of received baseband signals to remove carrier offsets therefrom, wherein the flexible architecture of said modem system allows for removal of said carrier offsets to improve reception of said plurality of received baseband signals.

REFERENCES:
patent: 7019595 (2006-03-01), Lo et al.
patent: 7197094 (2007-03-01), Tung
patent: 7245677 (2007-07-01), Pare, Jr.
patent: 7248650 (2007-07-01), Tung et al.
patent: 7266146 (2007-09-01), Pare, Jr. et al.
patent: 2003/0123582 (2003-07-01), Kim et al.
patent: 2004/0120412 (2004-06-01), Banerjea

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