Transmitter which adjusts peak-to-average power of a multicarrie

Details Transmitter which adjusts peak-to-average power of a multicarrie Transmitter which adjusts peak-to-average power of a multicarrie

1996-03-21

1998-01-20

Au, Amelia

Telecommunications

Transmitter

Plural separate transmitters or channels

455116, H04B 102, H01Q 1112, H01Q 104

Patent

active

057109907

ABSTRACT:
An apparatus (10) for adjusting peak-to-average power of a multicarrier signal. The apparatus (10) comprises a first (26) and second (28) combiner, a phase-changing device (30), and a switch (36). The first combiner (26) receives a first group of channels (20) and a second group of channels (22) and produces a first combined signal (46). The phase-changing device (30) receives the first group of channels (20) and produces a group of phase-adjusted channels. The second combiner (28) receives the phase-adjusted channels and the second group of channels (22) and produces a second combined signal (48), and the switch (36) responds to the first (26) and second (28) combiners and selects at least one of the first (46) and second (48) combined signals.

REFERENCES:
patent: 5128964 (1992-07-01), Mallory
patent: 5157346 (1992-10-01), Powell et al.
patent: 5201071 (1993-04-01), Webb
patent: 5302914 (1994-04-01), Arntz et al.
patent: 5349300 (1994-09-01), Matz et al.
patent: 5381449 (1995-01-01), Jasper et al.
patent: 5420541 (1995-05-01), Upton et al.
patent: 5646631 (1997-07-01), Arntz
Minimisation of the Peak to Mean Envelope Power Ratio of Multicarrier Transmission Schemes by Block Coding by T. A. Wilkinson, Hewlet Packard Lab., and A. E. Jones, Motorola UK, pp. 1-15.

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