On the UWB system coexistence with GSM900, UMTS/WCDMA, and GPS
On the UWB system coexistence with GSM900, UMTS/WCDMA, and GPS
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DOI：
10.1109/jsac.2002.805242
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发表时间：
2002-12-01
影响因子：
16.4
通讯作者：
Latva-Aho, M
中科院分区：
文献类型：
--
作者：
Hämäläinen, M;Hovinen, V;Latva-Aho, M
本文评估了不同的超宽带（UWB）信号对其他各种无线电系统造成的干扰水平，以及在存在窄带干扰和脉冲干扰的情况下UWB系统的性能下降。由选择的 UWB 信号引起的带内干扰在 GSM900、UMTS/宽带码分多址 (WCDMA) 和全球定位系统 (GPS) 频带上计算为 UWB 脉冲宽度的函数。基于高斯脉冲的多个短脉冲波形可用于生成 UWB 传输。这里研究的两个 UWB 系统概念是跳时和直接序列扩频。使用基带二进制脉冲幅度调制作为数据调制方案。正确选择脉冲波形和脉冲宽度可以避免某些被拒绝的频带达到一定限度。然而，脉冲形状也与数据速率要求交织在一起。如果在 UWB 通信中使用短脉冲，根据结果优选高通滤波波形。然而，使用长脉冲则有利于通用高斯波形。如果窄带干扰与 UWB 信号的标称中心频率重叠，则 UWB 系统最容易受到窄带系统的影响。在全球移动通信系统 (GSM) 和 UMTS/WCDMA 频率上存在干扰的加性高斯白噪声 (AWGN) 信道中的误码率仿真证明了这一点。
This paper evaluates the level of interference caused by different ultra-wideband (UWB) signals to other various radio systems, as well as the performance degradation of UWB systems in the presence of narrowband interference and pulsed jamming. The in-band interference caused by a selection of UWB signals is calculated at GSM900, UMTS/wideband code-division multiple-access (WCDMA), and global position system (GPS) frequency bands as a function of the UWB pulsewidth. Several short-pulse waveforms, based on the Gaussian pulse, can be used to generate UWB transmission. The two UWB system concepts studied here are time hopping and direct sequence spread spectrum. Baseband binary pulse amplitude modulation is used as the data modulation scheme. Proper selection of pulse waveform and pulsewidth allows one to avoid some rejected frequency bands up to a certain limit. However, the pulse shape is also intertwined with the data rate demands. If short-pulses are used in UWB communication the high-pass filtered waveforms are preferred according to the results. The use of long pulses, however, favors the generic Gaussian waveform instead. An UWB system suffers most from narrowband systems if the narrowband -interference and the nominal center frequency of the UWB signal overlap. This is proved by bit-error rate simulations in an additive white Gaussian noise (AWGN) channel with interference at global system for mobile communication (GSM) and UMTS/WCDMA frequencies.