关键词: 信道估计误差, 速率, 上界, 干扰泄漏

Abstract:

In practical applications, estimation error, quantization error and feedback delay bring out imperfect perfect Channel State Information（CSI）. Particularly for a Vandermonde-subspace Frequency Division Multiplexing（VFDM） based two-tiered spectrum sharing system, a performance degradation evaluation of the macrocell is proposed based on the upper bound of rate loss when bounded channel estimation error is considered. It first derives the upper bound of interference leakage generated by the bounded error. Then, with the relationship between interference leakage and achievable system rate, it obtains the upper bound of rate loss. Finally, numerical results are presented to verify the correctness of the derivation and the upper bound of rate loss can better describe the system degradation with bounded channel estimation error.

Key words: channel estimation error, rate, upper bound, interference leakage