Patent ID: 8014435

Claim:
A method for use in forming packet preambles for transmission in an orthogonal frequency division multiplexing (OFDM) ultrawideband (UWB) communication system with frequency hopping, comprising: providing a sequence of samples, the sequence of samples providing information for an OFDM symbol; forming a sequence of OFDM symbols, the sequence including at least 12 OFDM symbols, each of the OFDM symbols in the sequence of OFDM symbols including the sequence of samples; effectively multiplying the sequence of samples of the at least 12 OFDM symbols by a cover sequence including at least the sequence 1,1,−1,−1,1,1,1,1,1,1,−1,−1; appending null samples to the OFDM symbols of the sequence of OFDM symbols; converting the OFDM symbols of the sequence of OFDM symbols to analog signals; upconverting the analog signals; and transmitting the upconverted analog signals.