| 摘要 |
<p>A hybrid spread spectrum system (10) includes a signal combiner (14) for (a) receiving a plurality of spread spectrum encoded data signals and (b) forming a plurality of combined signals. A first set of mixers is included for (a) receiving the plurality of combined signals and at least two carriers, and (b) forming at least a two-carrier, constant envelope signal. A second set of mixers is also included for (a) receiving the at least two-carrier, constant envelope signal and a transmitter hopping signal and (b) forming a hybrid spread spectrum signal. The combined signals include (a) [s 1 (t) - s 1 (t)s 2 (t)S 3 (t)] and (b) [s 2 (t) + s 3 (t)] , where s i (t) are three separate spread spectrum encoded data signals. The transmitter hopping signal is a sequence of tones having (a) a duration T c , where T c is a chip duration, and (b) frequencies f n taken from a set of 2 k values, where k is a number of bits from a pseudo-random noise (PRN) sequence.</p> |
