Design and performance comparison of a superregenerative MPSK transceiver

Abstract

Abstract-In this paper we present a superregenerative transceiver able to switch among BPSK, QPSK and 8PSK modulations. An HF-band proof-of-concept transceiver is implemented on an FPGA with a minimum of analog circuitry. The desire of making fair comparisons between BER figures rises a problem of clock frequency selection which is finally solved without consuming extra resources.

Superregeneration Revisited: From Principles to Current Applications

“…This idea was further refined in [40] where the SRO signal was sub-sampled with a D-type flip-flop at a frequency lower (or even substantially lower) than ω 0 to get a shift-register filled with a set of 1-bit samples that represents the SRO output phase. The complexity of the required digital hardware is orders of magnitude simpler than with conventional IQ receivers and allows building of complete BPSK, QPSK, or 8PSK receivers [41] with very few resources, without spoiling the main point of SR reception: simplicity. The same net effect can be achieved by sampling several RCdelayed versions of the SRO output [42]- [44].…”