Redpine Signals, Inc.

Ravikumar Neerudu

Narasimhan Venkatesh

Ponnamanda Venkata Chandra Sekhar

A wireless link simulator includes, in sequence, a digital transmit device under test (TX-DUT), a wireless link simulator, and a digital receive device under test (RX-DUT). The wireless link simulator includes, in sequence, a transmitter IQ imbalance generator, a power amplifier non-linearity generator, a noise floor generator, a multi-path channel generator, a receive noise generator, a frequency offset generator, a phase noise generator, a receive IQ imbalance generator, and a DC offset generator. Each of the generators may be individually varied to determine the receiver sensitivity to each of these effects and associated parameters.

Wireless link simulator

A integrated system for generation of packet detection, symbol timing, and coarse frequency offset for an orthogonal frequency division multiplexed (OFDM) receiver having a stream of input symbols applied comprises a first multiplier performing a multiplication on a delayed and conjugated stream of input symbols multiplied by the input symbol stream. The output of the first multiplier is summed over a symbol length. A second multiplier has an output formed from multiplying the delayed symbol stream by its conjugate, thereby providing a signal strength term Pn. The output of the second multiplier is summed over two symbol periods, and multiplied by a known threshold to form a threshold value. When the magnitude of cn term rises above the known threshold, this generates a packet detect output, and when the magnitude of Cn terms thereafter falls below the known threshold, this generates a symbol timing output.

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Khammam, India

Ravikumar Neerudu