Pctel, Inc.

Yuelun Guo

Wei Lu

Wei Zha

Amir Soltanian

A system and method for determining the presence of interfering signals in a wireless environment. A programmable RF card is programmed to collect a wideband signal based upon user requested signals of interest. Collected signals are analyzed and the presence of specific interfering signals is determined. The interfering signals are then tracked and reported.

System and method for wideband wireless system scanning

A system and method for SSS detection under carrier frequency offset in an orthogonal frequency-division multiple access (OFDMA) downlink channel. A processor receives a signal sample that includes a transmission on a primary synchronization signal (PSS) and a transmission on a one secondary synchronization signal (SSS). The processor determines a correlation 'P' of a first symbol transmitted in the PSS of the signal sample to a first known symbol at each time 't' of time increments k of the signal sample and a correlation &#x201c;S&#x201d; of a second symbol transmitted in the a SSS to a second known symbol at each time t-.5/7 msecs. The processor receives a candidate phase rotation of &#x3b8;from a set of &#x201c;i&#x201d; candidates and determines a correlation &#x201c;Cmax&#x201d; over the time increments k representing a maximum amplitude of a combined correlation of S and P, with P rotated by &#x3b8;. The processor determines the cell identifier from the first and second known symbols that produced S and P of C max and an estimation of the frequency offset between a transmitter of the signal sample and a receiver of the signal sample.

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Germantown, MD, United States of America

Yuelun Guo