Portable communications device with demodulation correction and related methods
AssigneeHarris Corporation, Corporation of the State of Delaware
InventorJohn W. Nieto
Life of this patent
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Abstract
A portable communications device communicates based upon constant envelope orthogonal frequency-division multiplexing (CE-OFDM). The portable communications device may include an antenna for receiving a CE-OFDM signal, and a receiver coupled to the antenna. The receiver may include a frequency domain equalizer (FDE) operating based upon a channel estimate of the received CE-OFDM signal, a non-linear function block coupled to and downstream from the FDE, and a demodulation correction block coupled to and downstream from the non-linear function block for correcting an output of the non-linear function block.
Claims20
A portable communications device communicating based upon constant envelope orthogonal frequency-division multiplexing (CE-OFDM) and comprising:
- an antenna for receiving a CE-OFDM signal;
- and
- a receiver coupled to said antenna and comprising
- a frequency domain equalizer (FDE) operating based upon a channel estimate of the received CE-OFDM signal,
- at least one non-linear function block coupled to and downstream from said EDE, and
- a demodulation correction block coupled to and downstream from said at least one non-linear function block for correcting an output thereof.
A portable communications device communicating based upon constant envelope orthogonal frequency-division multiplexing (CE-OFDM) and comprising:
- an antenna for receiving a CE-OFDM signal;
- and
- a receiver coupled to said antenna and comprising
- a frequency domain equalizer (FDE) operating based upon a channel estimate of the received CE-OFDM signal from a test chirp signal,
- at least one non-linear function block downstream from said FDE, and
- a demodulation correction block being downstream from said at least one non-linear function block and using a test CE-OFDM frame to correct an output thereof.
A method of operating a portable communications device communicating based upon constant envelope orthogonal frequency-division multiplexing (CE-OFDM) and comprising a frequency domain equalizer (FDE), a demodulation correction block downstream from the FDE, and at least one non-linear function block therebetween, the method comprising:
- receiving a CE-OFDM signal;
- operating the FOE based upon a channel estimate of the received CE-OFDM signal;
- and
- using the demodulation correction block for correcting the output of the at least one non-linear function block.
Dependencies are inferred from the claim text.