Patent ID: 9225383
Filing Date: 2015-12-29
Classification: G01S,H04B

Abstract:
1. A direct sequence spread spectrum (DSSS) data transmitter capable of creating a modulated data signal, the transmitter comprising: a programmable-system-on-a-chip baseband modulator comprising four blocks of programming logic, wherein a first block is configured to receive a first clock signal and generate spreading code, an 8-bit second block is configured to receive a second clock signal and generate a terminal count (TC) bit rate, and a third block is configured to receive the TC bit rate and generate a first data output, the third block comprising a serial peripheral interface slave (SPIS) clocked by the TC, and wherein the 8-bit second block is a timer preloaded with a seed count value and a compare value, the seed count value comprising a starting binary value that counter reloads on the TC, and the TC is configured to be toggled when the timer counts down to zero, the compare value is toggled only when a countdown value of the timer matches a compare value parameter to provide a start and stop frame signal for the DSSS, the first data output is exclusive-or (XOR) combined with the spreading code to generate the modulated data signal; and a fourth block is configured to perform a buffering function to route a second clock signal to be AND combined with the compare value for generating the first clock signal and providing the first clock signal to the first block.