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Conference Paper
Performance analysis of word-length effect on the hardware design in MMSE/DD space-time array receiver
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- Authors
- Jun Hwan Lee, Hyun Seo Oh, Mun Geon Kyeong
- Issue Date
- 2001-05
- Citation
- Vehicular Technology Conference (VTC) 2001 (Spring), pp.171-174
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- In this paper, the BER performance of MMSE/DD (decision-directed minimum mean square error) adaptation algorithm-based space-time array receiver was analyzed for wideband CDMA basestation system, taking account of word length or quantized bit size of weight and input snapshot vectors under Rayleigh fading channel with two multipaths and mobile speed of 60 km/h and 200 km/h. In conjunction with existing demodulator input to the base station modem chip, the floating and fixed point simulation results were examined and the basic guideline to determine the optimal bit resolution of weight and IQ input vectors fed into DBFN (digital beamforming network) was recommended for efficient design of digital beamformers and multi-channel ADCs (analog-to-digital converters).
- KSP Keywords
- Analog-to-digital converters(ADCs), BER performance, Bit size, Digital beam forming(DBF), Length effect, Minimum Mean Square Error(MMSE), Performance analysis, Rayleigh fading channel, Space time(ST), Space-time array, Wideband CDMA