Abstract
In this paper, a new multi-band ultra wideband (UWB) system with Hadamard coding, namely, MB-H-UWB, is proposed. The ultra-wide bandwidth is divided into M sub-bands. The sub-bands are then coded with Hadamard codes. In this way, the frequency diversity is obtained. Transmitted data bits are modulated in the corresponding coded sub-bands. Both single and multiple user system are considered in this paper. Random time-hopping sequence is used for the multi-user access. Simulation results show that the proposed MB-H-UWB system can accomplish a 1.7dB gain of SNR for single-user, and 2.8dB gain and 4dB gain for 10 active user and 20 active users, respectively, over BPSK-UWB system in AWGN channel with the targeted uncoded Bit Error Rate (BER) of 10-3. Simulation results also show that the proposed MB-H-UWB system outperforms BPSK-UWB system by 2dB in an indoor multipath propagation channel. The performance gain of the MB-H-UWB system can benefit range extension and higher throughput for UWB communication systems. Moreover, the proposed system requires less Rake receiver fingers than the single-band (7.5GHz bandwidth) UWB system so that the complexity of receiver can be reduced significantly.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1288-1292 |
| Number of pages | 5 |
| Journal | IEEE Vehicular Technology Conference |
| Volume | 58 |
| Issue number | 2 |
| State | Published - 2003 |
| Event | 2003 IEEE 58th Vehicular Technology Conference, VTC2003-Fall - Orlando, FL, United States Duration: Oct 6 2003 → Oct 9 2003 |
Keywords
- Hadamard code
- Multi-band
- UWB
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics