Multiplier arrangement, signal modulator and transmitter

Details Multiplier arrangement, signal modulator and transmitter Multiplier arrangement, signal modulator and transmitter

2005-09-06

2005-09-06

Le, Amanda T. (Department: 2634)

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

C708S620000, C708S835000, C327S357000, C327S359000

Reexamination Certificate

active

06940920

ABSTRACT:
A multiplier arrangement (MUXER) is adapted to generate from analog phase information and from high-frequency local oscillator signals, components of a high-frequency phase vector (PV), and to synthesise said high-frequency phase vector (PV) from said components within a summing means is further adapted to provide said high-frequency phase vector (PV) as a vector which is making an excursion alongside the contours of a square within the complex plane during a first category of predetermined transitions of a phase signal (φ) on which said analog phase information is dependent. A signal modulator including such a multiplier arrangement as well as a transmitter are described as well.

REFERENCES:
patent: 4726039 (1988-02-01), Piesinger
patent: 5802111 (1998-09-01), Diehl et al.
Jan Sevenhans et al, Trends in silicon radio Large Scale Integration: Zero IF Receiver! Zero I & Q Transmitter! Zero Discrete Passives!, Topics in Circuits for Communications, IEEE Communications Magazine, Jan. 2000, vol. 38, No. 1, pp. 142-147.
T. Tsukahara et al, “A 2V 2GHZ-SI Bipolar Direct-Conversion Quadrature Modulator”, IEEE International Solid State Circuits Conference, vol. 37, Feb. 16, 1994, pp. 40-41, 306 XP000507053.
A. Boveda et al, “A 0.7-3 GHZ GAAS QPSK/QAM Direct Modulator”, IEEE Journal of Solid-State Circuits, vol. 28, No. 12, Dec. 1993, pp. 1340-1349, XP000435908.
K. Feher et al, Constant Envelope Bandlimited BPSK Signal, IEEE Transactions on Communications, vol. COM-28, No. 6, Jun. 1980, pp. 889-897, XP000758583.

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