Patent ID: 7636380

Claim:
A device comprising: one or more processors; one or more computer-readable storage media comprising data signal modulation logic executable on the one or more processors to: modulate data using orthogonal code sequences to convert the data into chip waveforms having chip polarity information that encodes sign value information from the orthogonal code sequences; and a transceiver to transmit a wireless signal carrying the modulated data to another device; wherein the data signal modulation logic is further adapted to: modulate the data using a pulse-shaping baseband waveform that is derived based on a frequency-dependent path loss and a power spectrum density constraint to create a more power efficient pulse, wherein the pulse-shaping baseband waveform comprises: a fifth-order Gaussian derivative waveform for single-band ultra wideband (UWB) systems; and a root-raised-cosine waveform with a roll-off factor set between 0.2 and 0.5, inclusive, for multiband UWB systems; and modulate the data by removing at least one spectrum line from a power spectrum density of the wireless signal carrying the modulated data, wherein the at least one spectrum line is removed by the data signal modulation logic by balancing chip polarities of the chip waveforms; wherein sign value information for respective characters of the orthogonal code sequence is reflected in a corresponding chip waveform by chip polarities of respective individual chips of the corresponding chip waveform.