Spectral power management for constrained transmissions...

Details Spectral power management for constrained transmissions... Spectral power management for constrained transmissions...

2006-07-25

2006-07-25

Patel, Jay K. (Department: 2637)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S265000

Reexamination Certificate

active

07082170

ABSTRACT:
In frequency channel communications, constraints on transmit power characteristics can be complied with by implementing constellation shaping (15, 71) in the transmitter. In transmitters which use transmit filtering (91) to comply with constraints on transmit power characteristics, the transmitter can also implement, upstream of the transmit filter, precoding (92) designed for a desired cooperation with the transmit filter.

REFERENCES:
patent: 5774500 (1998-06-01), Zogakis et al.
patent: 6553063 (2003-04-01), Lin et al.
patent: 0 383 632 (1990-08-01), None
patent: 1 128 625 (2001-08-01), None
Ophir, Lior et al.; Spectral Power Management for Constrained Transmissions Using Precoding and Transmit Filter; Co-pending U.S. Patent Application filed on May 10, 2002.
Eyuboglu, M. Vedat, et al., “Trellis Precoding: Combined Coding, Precoding and Shaping for Intersymbol Interference Channels,” IEEE Transactions on Information Theory, vol. 38, No. 2, Mar. 1992, Pt. I, New York, NY, US, pp. 301-314.
Forney, G. David, Jr., “Trellis Shaping,” IEEE Transactions on Information Theory, vol. 38, No. 2, Mar. 1992, Pt. I, New York, NY, US, pp. 281-300.

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