UWB multiple access performance using time hopped pulse position modulation with biorthogonal signaling

This paper extends previous UMB multiple access (MA) performance characterization by combining pseudorandomly coded, time hopped pulse position modulation (TH-PPM) with 4-ary biorthogonal communication signaling. Communication performance for the hybrid TH-BPPM technique is first validated for a single user operating over an AWGN channel. Single user results are then extended and MA performance characterized for both synchronous and asynchronous networks containing up to 15 users. In both cases, the proposed 4-ary TH-BPPM technique with Gold coding achieves nearly identical performance as previously demonstrated MA methods employing binary TH-PPM. A key benefit afforded by the 4-ary TH-BPPM technique, given fixed average power and symbol length constraints, is a doubling of the effective data rate while achieving identical bit error rate performance.