Rapid Prototyping of Parameterized Rotated and Cyclic Q Delayed Constellations Demapper

Rotated and Cyclic Q Delayed (RCQD) modulation is one of the signal processing schemes which, once used on the transmitter side, provides performance improvement on receiver side in case of fading channel conditions with erasures. However, an efficient hardware solution in terms of low area and high throughput is mandatory to get benefit from this modulation technique. In this paper we have implemented a parameterized hardware architecture of most recent RCQD demapping technique supporting different constellations. In addition to the description of the proposed hardware architecture, rapid prototyping flow based on LabVIEW FPGA is described which is useful to explore different design schemes in short period of time. The implementation results are achieved by FPGA prototyping while targeting NI-USRP RIO hardware equipment. By comparing our rapidly prototyped parameterized RCQD demapper with other state-of-the-art implementation schemes, it is shown that our prototyped demapper consumed lesser hardware resources and achieved higher throughput with very short design time.