Performance Analysis in CDMA-based Cognitive Wireless Networks with Spectrum Underlay
In a cognitive wireless network with spectrum underlay, secondary links can transmit at the same spectrum as primary links as long as the interference to the primary links is below a pre-negotiated interference threshold. This paper studies the effect of setting different interference thresholds on the transmission rate of the secondary links and how secondary transmissions affect the primary links. An optimization problem is formulated to ﬁnd the maximum achievable rate for the secondary links given the interference threshold, and an analytical model is developed to ﬁnd the interference level at the primary link receiver. Our results show some interesting relationship among the interference threshold, transmission rate of secondary links, and transmission power increase of the primary links in such networks.
- Joint Rate and Power Allocation for Cognitive Radios in Dynamic Spectrum Access Environment
- managing the interference structure of MIMO HSDPA: A multi-user interference aware MMSE receiverwith moderate complexity
- Ultra wideband communication trends and challenges
- Survey on Spectrum Management in Cognitive Radio Networks
- ultra wide band tutorial