Method and apparatus for signal decoding in a diversity reception system with maximum ratio combining

BA Wallace, JW Girardeau Jr, JR Kelton - US Patent 7,421,046, 2008 - Google Patents
A method signal for decoding in a diversity reception system can include converting the
received RF signal into a plurality of digital baseband signals; phase aligning the plurality of …

Phase combining diversity

S Chari, R Krishnomoorthy - US Patent 7,324,794, 2008 - Google Patents
Embodiments of methods of receiving transmitted signals are disclosed. The methods
include a first antenna receiving a second signal, a second antenna receiving a second …

Systems and methods for reducing directional interference based on adaptive excision and beam repositioning

RB Dybdal - US Patent 10,056,675, 2018 - Google Patents
Abstract Systems and methods are provided for repositioning a directional antenna that
responds to a desired signal and directional interference. The antenna can generate a sum …

Apparatus and method for measuring signal quality of a wireless communications link

R Narasimhan - US Patent 7,016,651, 2006 - Google Patents
Techniques for measuring Signal quality in a communica tions link supporting OFDM symbol
transfer across plural Sub-carriers are disclosed. These techniques employ a link interface …

System and method for adaptive phase compensation of OFDM signals

AA Maltsev, AE Rubtsov, AM Soupikov - US Patent 7,457,366, 2008 - Google Patents
An OFDM receiver applies phase compensation to subcarriers of data symbols of an OFDM
packet. A phase compensation estimate is generated from pilot subcarriers within the data …

System and method for two channel frequency offset estimation of OFDM signals

AA Maltsev, AV Pudeyev, AM Soupikov… - US Patent …, 2008 - Google Patents
Orthogonal frequency division multiplexing (OFDM) is a multi-carrier transmission technique
that uses orthogonal 30 Subcarriers to transmit information within an available spec trum …

Phase locked loop for an OFDM system

AK Gupta - US Patent 7,203,261, 2007 - Google Patents
Techniques are provided for tracking residual frequency error and phase noise in an OFDM
system. At a receiver, each received OFDM symbol is transformed with an FFT to obtain …

OFDM receiver

H Fujii, H Suda - US Patent 7,415,085, 2008 - Google Patents
An OFDM receiver receives an OFDM signal transmitted from an OFDM transmitter by using
a sub-carrier. The OFDM receiver includes a channel estimator configured to obtain a …

Universal soft decision demodulator for M-ary adaptive modulation systems

M Zhang, S Kim, Y Kim - 2012 18th Asia-Pacific Conference on …, 2012 - ieeexplore.ieee.org
In this paper, we present a very simple soft demapping algorithm for M-ary PSK and QAM
schemes and their universal implementation for adaptive modulation systems. The proposed …

Communication system with adaptive channel correction

L Kennedy, P Runkle, B Guenther - US Patent App. 10/435,047, 2004 - Google Patents
Adaptive methods and systems for applying a channel correction factor to received signals
to correct errors caused by channel distortion. The channel correction factor is dynamically …