Patent ID: 8917786
Filing Date: 2014-12-23
Classification: H04L

Abstract:
1. A method for implementation of Quadrature Layered Modulation (QLM) for communications over the same frequency bandwidth of a carrier frequency, said method comprising the steps: generating a scaled communications signal over the frequency bandwidth at the carrier frequency by modulating a stream of data symbols with a waveform at a n selecting said scaled value to compensate for the loss in the detectable signal energy caused by the interference of the overlapping signals, transmitting and receiving said scaled communications signal over a QLM communications link consisting of a modulated stream of data symbols with a waveform at a n recovering data symbols of the scaled communications signals in a receiver using a demodulation algorithm, and combining said algorithm with error correction decoding to recover the transmitted information; whereby time offsets between contiguous data pulses is the differentiating parameter to enable the QLM data symbol rate which is independent of the Nyquist rate, to be demodulated.