Method and apparatus for transmitter timing adjustment

Z Safar - US Patent 8,031,586, 2011 - Google Patents
A timing adjustment value is received, and from the received timing adjustment value is
determined an integer portion and a fractional portion. In the frequency domain, the …

Communication system, phase-locked loop, movable body and communication method

H Awata - US Patent 8,222,935, 2012 - Google Patents
A communication system includes a phase-locked loop that maintains synchronization of a
reception signal. The phase-locked loop includes a loop filter that has a circuit configuration …

Method and apparatus for frequency offset estimation and correction in orthogonal frequency division multiplexing system

P Li, Z Zeng, H Qin, W Sun, L Han, J Lei - US Patent 8,774,034, 2014 - Google Patents
(86) O orthogonal frequency division multiplexing (OFDM) system S371 (c)(1), is disclosed
in present invention, including: obtaining a pilot (2),(4) Date: Dec. 27, 2011 frequency …

Carrier frequency estimation method and apparatus in wireless communication system

HJ Ro, JH Lee - US Patent 8,355,468, 2013 - Google Patents
(57) ABSTRACT A carrier frequency estimation method and apparatus is pro vided for
improving frequency estimation performance in an Orthogonal Frequency Division …

Receiver, method of reception, reception program, integrated circuit, and digital television

M Araki, T Kimura - US Patent 8,363,759, 2013 - Google Patents
A receiver which allows suitable setting of the position of an FFT (Fast Fourier Transform)
window (execution timing) when executing FFT to demodulate an OFDM (Orthogonal …

Wireless radio receiver that performs adaptive phase tracking

M Löhning, E Ohlmer - US Patent 10,218,548, 2019 - Google Patents
US10218548B1 - Wireless radio receiver that performs adaptive phase tracking - Google
Patents US10218548B1 - Wireless radio receiver that performs adaptive phase tracking …

Uplink synchronization without periodic ranging in a communication system

X Yu, MN Kloos, AP Rottinghaus - US Patent App. 12/107,858, 2009 - Google Patents
An apparatus and method for uplink synchronization without periodic ranging in a
communication system includes a first step (700) of detecting embedded pilot signals in data …

Wireless radio receiver that performs adaptive phase tracking

M Löhning, E Ohlmer - US Patent 10,218,549, 2019 - Google Patents
(57) ABSTRACT A post-equalization phase tracking unit, for each signal block of a received
series: computes beginning absolute phase rotation using equalized preceding pilot …

Method and apparatus for channel estimation tolerant to timing errors

B Patel - US Patent 9,509,542, 2016 - Google Patents
Channel estimation is essential in a receiver for many communication systems. In OFDM
systems the channel estimation is often performed in frequency domain. Typically an FFT is …

OFDMA baseband clock synchronization

M Rodriguez, H Xu - US Patent 11,343,066, 2022 - Google Patents
A method for synchronizing baseband clocks in an OFDMA wireless microphone system is
disclosed. An example method includes receiving a plurality of pilot subcarriers from an …