부산대학교 도서관

We propose a technique for low-data rate (∼ 100 kb/s) millimeter-wave radio communications for applications involving large numbers of users in severe interference environments. The essential principle is to divide large bandwidths into channels having bandwidths which are individually orders of magnitude greater than the message bit rate, apply a direct sequence spread spectrum carrier to each channel, and represent information as time offsets between channels. Among other benefits, this approach is intrinsically robust to multipath fading and delay spread, is intrinsically robust to interference, and is well-suited for low-size/weight/power/cost implementation. In this paper we describe the technique, analyze performance, and describe a simple hardware implementation.