Six-port receiver local oscillator power selection for maximum output SNR

Publikationstyp
Conference Paper
Date Issued
2008-01
Sprache
English
Author(s)
Winter, Sebastian M.  
Ehm, Henning J.  
Kölpin, Alexander  orcid-logo
Weigel, Robert  
TORE-URI
http://hdl.handle.net/11420/6830
Start Page
151
End Page
154
Article Number
4463451
Citation
IEEE Radio and Wireless Symposium, RWS: 4463451 151-154 (2008-01)
Contribution to Conference
IEEE Radio and Wireless Symposium, RWS 2008  
Publisher DOI
10.1109/RWS.2008.4463451
With an ideal model of a six-port communications receiver in mind, the optimal local oscillator (LO) power at the diode mixers for maximum signal-to-noise-ratio (SNR) at the baseband outputs is determined by simulations. The simulation setup contains the equivalent circuit for a diode mixer that has been used in a six-port communications receiver demonstrator [1]. By means of noise analysis and one tone harmonic balance simulations the SNR characteristics with respect to the LO power is derived in the presence of diode shot noise, and of diode shot noise combined with LO phase noise. The results show that a properly adjusted LO power is essential for the receiver performance.