Orthogonal frequency division multiplexing transceiver and...

Details Orthogonal frequency division multiplexing transceiver and... Orthogonal frequency division multiplexing transceiver and...

2006-06-06

2006-06-06

Vo, Nguyen T. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S255000, C455S323000, C375S328000

Reexamination Certificate

active

07058379

ABSTRACT:
For use in an orthogonal frequency division multiplexing (OFDM) transceiver, a multimode local oscillator circuit and a method of operating the same. In one embodiment, the circuit includes: (1) a single sideband mixer having an output, first and second inputs and a local oscillator input and (2) a signal generator, coupled to the single sideband mixer, for alternatively providing to the first and second inputs: (2a) constant values to cause the single sideband mixer to generate a first receiver local oscillator signal for operating the OFDM transceiver as a zero intermediate frequency receiver and (2b) a first orthogonal baseband signal to cause the single sideband mixer to generate a second receiver local oscillator signal for operating the OFDM transceiver as a low intermediate frequency receiver.

REFERENCES:
patent: 6944121 (2005-09-01), Weste et al.
patent: 2002/0054627 (2002-05-01), Asikainen
patent: 2004/0087279 (2004-05-01), Muschallik et al.

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