US 7,072,390 B1 · Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments

Abstract

Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal generator, a demodulation/modulation facilitation module, and a MAC interface. The WLAN receiver includes at least one universal frequency translation module that frequency down-converts a received EM signal. In embodiments, the UFT based receiver is configured in a multi-phase embodiment to reduce or eliminate re-radiation that is caused by DC offset. The WLAN transmitter includes at least one universal frequency translation module that frequency up-converts a baseband signal in preparation for transmission over the wireless LAN. In embodiments, the UFT based transmitter is configured in a differential and multi-phase embodiment to reduce carrier insertion and spectral growth.

Claims28

Dependent claims

A wireless modem apparatus, comprising:

a transmitter for up-converting a baseband signal, including, an inverter, to receive said baseband signal and generate an inverted baseband signal;
a first controlled switch to sample said baseband signal according to a first control signal, resulting in a first harmonically rich signal;
a second controlled switch, coupled to said inverter, said second controlled switch to sample said inverted baseband signal according to a second control signal, resulting in a second harmonically rich signal;
and
a combiner, coupled to said first controlled switch and said second controlled switch, said combiner to combine said first harmonically rich signal and said second harmonically rich signal, resulting in a third harmonically rich signal.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/632,855Filed 4 Aug 2000 · us provisional application

Priority

4 Aug 1999

Granted

4 Jul 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04L 25/061
DC level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection: providing hard decisions only;…
H04L 27/22
Phase-modulated carrier systems, i.e. using phase-shift keying: demodulator circuits; Receiver circuits
H04L 27/38
Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems: demodulator circuits; Receiver circuits
H04W 4/18
Services specially adapted for wireless communication networks; Facilities therefor: information format or content conversion, e.g. adaptation by…

Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments

Life of this patent

Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments

Life of this patent

Abstract

Claims28