Patent ID: 6940893
Filing Date: 2005-09-06
Classification: H04B

Abstract:
1. A method of communicating over a wireless indoor telecommunications channel, the method comprising the steps of: generating a pulsed signal in which information is carried in the phase of the pulsed signal; spreading the pulsed signal using a dispersive filter to form a chirp spread spectrum signal; transmitting the chirp spread spectrum signal over a wireless indoor telecommunications channel; receiving the chirp spread spectrum signal at a receiver; despreading the chirp spread spectrum signal using an inverse dispersive filter that is matched to the dispersive filter to yield a received signal; removing the phase of the received signal, using a phase demodulator, thereby generating cophased channel impulse responses; passing the cophased channel impulse responses through a low-pass filter to generate data symbols; and recovering the information carried in the phase of the pulsed signal from the generated data symbols.