A scheme of Dual Carrier Modulation with Soft-decoding for MB-OFDM MIMO systems

Abstract

The basic structure of the Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) Ultra-Wide Band (UWB) System is discussed in this paper. The fixed-point simulation platform using the WiMedia Alliance proposed by ECMA 368 standards has been implemented. An extension of the physical layer using the Alamouti method to a MultipleInput Multiple-Output (MIMO) system is also presented. Based on the theoretical Dual Carrier Modulation (DCM) supported by Media Alliance, we propose a scheme of the DCM-Modulation and DCM-Demodulation with Soft-decoding for a MB-OFDM MIMO system. The system performance is analyzed using the Saleh-Valenzuela channel model in terms of the bits error rate and the transmission range for indoor environments.

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“…The groups have 528MHz bands in four distinct groups. Figure 7: Multi-Band OFDM Physical Layer [14] The groups are as follows: i. Group A: is destined for the 1 st generation devices and the frequencies range from 3.1 -4.9GHz.…”

Integrating dual antennas with hybrid dual circular 32‐quadrature amplitude modulation to increase the coverage area for wireless sensor networks

“…The two subcarriers containing the I (in phase) and Q (quadrature phase) components of that particular symbol are then separated by 50 FFT (fast Fourier transform) tones. Hence this diversity produces two different signals with various power strengths associated with the symbol [11].…”

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