Abstract
A new modulation scheme is proposed for a time reversal (TR) ultra wide-band (UWB) communication system. The new modulation scheme uses the binary pulse amplitude modulation (BPAM) and adds a new level of modulation to increase the data rate of a TR UWB communication system. Multiple data bits can be transmitted simultaneously with a cost of little added interference. Bit error rate (BER) performance and the maximum achievable data rate of the new modulation scheme are theoretically analyzed. Two separate measurement campaigns are carried out to analyze the proposed modulation scheme. In the first campaign, the frequency responses of a typical indoor channel are measured and the performance is studied by the simulations using the measured frequency responses. Theoretical and the simulative performances are in strong agreement with each other. Furthermore, the BER performance of the proposed modulation scheme is compared with the performance of existing modulation schemes. It is shown that the proposed modulation scheme outperforms QAM and PAM for in an AWGN channel. In the second campaign, an experimental validation of the proposed modulation scheme is done. It is shown that the performances with the two measurement campaigns are in good agreement.
Highlights
One of the biggest strengths of the ultra wide-band (UWB) technology is derived by its ultra large bandwidth
A new modulation scheme is proposed for a time reversal (TR) ultra wide-band (UWB) communication system
The proposed modulation scheme adds a new level of modulation to the existing modulation scheme like bipolar pulse amplitude modulation (BPAM)
Summary
One of the biggest strengths of the UWB technology is derived by its ultra large bandwidth. This paper proposes a novel modulation scheme which improves the data rate by spreading the transmitted data in a given large bandwidth, over the delay time. This scheme has been submitted in one of the patents submitted by IETR [17]. The BER performance of the new modulation scheme and the maximum achievable data rate are theoretically analyzed.
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