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Method for signal acquisition on multiple antennas

IP.com Disclosure Number: IPCOM000124275D
Publication Date: 2005-Apr-14
Document File: 2 page(s) / 51K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for signal acquisition on multiple antennas. Benefits include improved functionality and improved performance.

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Method for signal acquisition on multiple antennas

Disclosed is a method for signal acquisition on multiple antennas. Benefits include improved functionality and improved performance.

Background

              Conventional acquisition methods are designed for single-in, single-out (SISO) systems with single receive antennas. Typically, the autocorrelation of the received signal is used to estimate the frequency offset for each antenna.

General description

              The disclosed method acquires the transmitted packet preamble on multiple receive antennas. Frequency estimates from the multiple antennas are averaged to compute the phase of the mean.

              This method can be applied to the acquisition of other parameters, such as symbol timing and

signal detection using clear channel assessment.

Advantages

The disclosed method provides advantages, including:

•             Improved functionality due to using antenna diversity by combining estimates from multiple receive antennas

•             Improved performance due to amplifying gains during radio frequency (RF) impairment

Detailed description

              The disclosed method acquires a signal using multiple antennas to improve performance. A frequency offset is estimated for each antenna. The final estimate is the average of the estimated offsets (see Figure 1). The results of the method are illustrated as the dotted magenta curve. The method provides about 0.5 dB of gain over the conventional simple method at low signal-to-no...