9 July 1999 Battlefield wideband transceivers based on combined N-ary orthogonal signaling and M-ary PSK modulation
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Abstract
In this paper we present a method of bandwidth efficient coded modulation suitable for spread spectrum radio with AJ- LPI capabilities. In the proposed scheme, we first examine the error control properties of orthogonal codes and show their potential uses in FECC. The aspect of this paper that motivates us is that an orthogonal code has an equal number of 1's and 0's. This is to say that an n-bit orthogonal code has n/2 1's and n/2 o's; i.e., there are n/2 positions where 1's and 0's differ. Therefore the distance between two orthogonal codes is also n/2. Exploitation of this distance property of orthogonal codes is the basis of our development in this paper. We then offer a simple and cost-effective solution to coded modulation without bandwidth expansion. We intend to show that parallel signal processing in conjunction with N-ary orthogonal signaling and M-ary modulation techniques offer a cost-effective solution to bandwidth efficient coded modulation.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Saleh Faruque, Saleh Faruque, Payam Maveddat, Payam Maveddat, } "Battlefield wideband transceivers based on combined N-ary orthogonal signaling and M-ary PSK modulation", Proc. SPIE 3709, Digitization of the Battlespace IV, (9 July 1999); doi: 10.1117/12.351600; https://doi.org/10.1117/12.351600
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