US 2013/0294343 A1 · METHOD AND APPARATUS FOR INITIAL ACQUISITION AND CELL SEARCH FOR AN OFDMA SYSTEM

Abstract

A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal, the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth and including information for providing at least partial cell identification information. The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection and frame boundary detection and cell specific information detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.

Claims22

Dependent claims

A method for use in a wireless communication receiver for receiving an orthogonal frequency domain multiple access (OFDMA) signal comprising a plurality of resource blocks, the wireless communication receiver including a controller and receiver circuitry, the method comprising the steps of:

receiving, by the receiver circuitry, the OFDMA signal comprising a first guard band, a synchronization channel signal, and a second guard band, wherein the synchronization channel signal is between the first guard band and the second guard band, wherein the first guard band and the second guard band span respective first and second bandwidths of the OFDMA signal, and wherein no signal is transmitted on the first guard band and the second guard band;
the controller detecting at least a portion of a first set of the plurality of resource blocks within the OFDMA signal, wherein the first set of the plurality of resource blocks comprises the synchronization channel signal, and the synchronization channel signal spans a bandwidth less than a bandwidth spanned by the first set of the plurality of resource blocks;
and
the controller detecting the synchronization channel signal within the first set of the plurality of resource blocks.

1 more element

A wireless communication receiver for receiving an orthogonal frequency domain multiple access (OFDMA) signal comprising a plurality of resource blocks, the wireless communication receiver comprising:

receiver circuitry receiving the OFDMA signal comprising a first guard band, a synchronization channel signal, and a second guard band, wherein the synchronization channel signal is between the first guard band and the second guard band, wherein the first guard band and the second guard band span respective first and second bandwidths of the OFDMA signal, and wherein no signal is transmitted on the first guard band and the second guard band;
and
a controller coupled to the receiver circuitry and detecting at least a portion of a first set of the plurality of resource blocks within the OFDMA signal, wherein the first set of the plurality of resource blocks spans a first bandwidth and comprises the synchronization channel signal, and the synchronization channel signal spans a second bandwidth less than the first bandwidth, the controller further detecting the synchronization channel signal within the first set of the plurality of resource blocks.

Dependencies are inferred from the claim text.

Method and apparatus for initial acquisition and cell search for an ofdma system

Life of this patent

Method and apparatus for initial acquisition and cell search for an ofdma system

Life of this patent

Abstract

Claims22