Spectral Shape Division Multiplexing (SSDM): Apparatus, Transmitter, Receiver and Detection

Abstract

Spectral Shape Division Multiplexing (SSDM): Apparatus, Transmitter, Receiver and Detection. Fausto Daniel Holguín-SánchezWireless communication companies require to use the frequency spectrum to operate.Both frequency licenses and infrastructure to reuse frequencies are costly resources subject to increasing demand. This work introduces a novel multiplexing method that saves spectrum called Spectral Shape Division Multiplexing (SSDM). Under certain configurations, SSDM displays higher flexibility and throughput than other spectrally efficient methods.SSDM defines the structure of a wireless multi-carrier by software. It is similar to Orthogonal Frequency Division Multiplexing (OFDM) in that both use overlapped subcarriers to make efficient use of allocated spectrum. However, SSDM has several advantages. Where OFDM organizes sub-carriers orthogonally, SSDM allows arbitrary frequency steps enabling higher spectral efficiency. Similarly, while OFDM and other spectrally efficient methods use sinusoidal pulse forms, SSDM can use non-standard pulses providing a greater control of the carrier. In this thesis, a SSDM transceiver is implemented to reduce the spectrum utilization. SSDM presents an increase in spectral efficiency of 20% average with respect to OFDM. The cost of this gain is higher computational speed and signal to noise ratio. ivThe mathematical models and possible architecture for an SSDM system with sinusoidal pulses is developed. The modem is compared with other spectrally efficient methods. Similarly, the trade-offs between spectral efficiency, bit-error rates, dimension of the carrier and sub-carrier spacing are subject of analysis.Keywords: shared spectrum multiplexing SSM, pulse shape division multiplexing PSDM, non orthogonal frequency division multiplexing NOFDM, spectrally efficient frequency division multiplexing SEFDM, overlapped frequency division multiplexing OvFDM, signal superposition transceiver. Thanks to Drs.