EXCESS NOISE IN HETERODYNE RECEIVERS

被引：2
|
作者：
SCHIESS, M [1 ]
JOHANSSON, BS [1 ]
机构：
[1] TELIA RES AB,S-13680 HANINGE,SWEDEN
来源：
IEE PROCEEDINGS-J OPTOELECTRONICS | 1993年 / 140卷 / 03期
关键词：
HETERODYNE RECEIVERS; EXCESS NOISE; LOCAL OSCILLATOR POWER;
D O I：
10.1049/ip-j.1993.0034
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The influence of excess noise above the classical shot noise level in heterodyne receivers is investigated. It is shown how excess noise from the local oscillator (LO), beside thermal and phase noise, influences the system performance. Under carefully controlled experimental conditions, the LO power can be decoupled from excess noise. This yields an optimum LO power to get maximum receiver sensitivity. The optimum LO power is determined by the transition from shot noise dominance to excess noise dominance.
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页码：217 / 220
页数：4
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