Configurable multimode despreader for spread spectrum applications

摘要

A configurable multimode despreader for spread spectrum applications is disclosed herein. The despreader includes a plurality of data lines, at least one selective coupler coupled to the plurality of data lines, at least one multiplier coupled to the selective coupler, and a code input line coupled to the multiplier. The selective coupler selectively couples one of the plurality of data lines with the multiplier per any one of a plurality of despreading protocols. The multiplier then multiplies a desired input data type received from the selective coupler with a despreading code chip received from the code input line to produce an observation. The programmable multimode despreader supports variable code and data modulation schemes and variable spreading factors.

主权项

1. A multi-mode despreader for despreading a received data signal, the despreader comprising:
an input configured to supply real and phase shifted components of a despreading code in parallel; a first selector configured to select one of real and phase shifted components of the data signal; a second selector, coupled in parallel with the first selector, and configured to select one of the real and phase shifted components of the data signal; a first modulator configured to modulate the first selected one of the real and phase shifted components of the data signal with the phase shifted component of the despreading code; and a second modulator configured to modulate the second selected one of the real and phase shifted components of the data signal with the real component of the despreading code.