METHOD FOR COMMUNICATION VIA THREE ORTHOGONAL WAVEFORMS

摘要

Aspects of the present disclosure aim at providing three orthogonal waveforms that can be used for transmitting 3n bits (n bits from each waveform) at a given frequency. Such three orthogonal waveforms can be used in applications such as QAM to create a 3-dimensional QAM, along with use in other like applications such as in Orthogonal frequency-division multiplexing (OFDM), Quadrature Phase Shift Keying (QPSK), Binary Phase Shift Keying (BPSK), among others. In an aspect, a method of the present disclosure includes a step of generating three orthogonal waveforms as cos(θ)+k, cos(θ+2π/3)+k, and cos(θ+4π/3)+k, where k is the DC component and can have a value of 0.5 volts, and θ=2πft with f being the (baseband or passband) frequency=1/T, with T being Time Period, and t being time. Cosine waveforms can be equivalently replaced by sine waveform separated by 120 degrees.

主权项

1. A method for generating orthogonal waveforms, the method comprising:
generating three phase shifted waveforms; and adding a direct current (DC) component to each of the three phase shifted waveforms having a same transmission frequency (f) to generate three orthogonal waveforms, wherein the three phase shifted waveforms are sinusoidal or co-sinusoidal.