Apparatus and method for determining a symbol rate and a carrier

Details Apparatus and method for determining a symbol rate and a carrier Apparatus and method for determining a symbol rate and a carrier

1995-07-28

1998-02-03

Tse, Young T.

Pulse or digital communications

Transceivers

Modems

375227, 370252, 370276, H04B 138

Patent

active

057152772

ABSTRACT:
An apparatus and method for a data communications device, such as a modem (100, 101), to determine a symbol rate and carrier frequency combination, from a received probe signal, for optimizing a bit rate for data transmission and reception. The various embodiments utilizing a processor (108) or a digital signal processor (106) receive a probe signal, which also typically contains noise and other distortions. The various method and apparatus embodiments then determine signal to distortion ratios for a plurality of symbol rate and carrier frequency combinations (820), and other optimization parameters, such as channel characteristics and attenuation distortion parameters (830). These optimization parameters are then utilized to determine an optimal symbol rate and carrier frequency (840).

REFERENCES:
patent: 4309773 (1982-01-01), Johnson et al.
patent: 4756007 (1988-07-01), Qureshi et al.
patent: 5048054 (1991-09-01), Eyuboglu et al.
patent: 5054034 (1991-10-01), Hughes-Hartogs
patent: 5214637 (1993-05-01), Sridhar et al.

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