Interference Suppression of Radio Signals in Urban Buildings

The structure, height, and density of urban buildings, as well as the electromagnetic radiation generated by the electronic devices and electronic circuits within the building, can have an impact on radio signals, leading to selective fading in frequency and affecting the quality of communication. Therefore, a suboptimal blind MSE detection method is proposed. When suppressing broadband interference (multiple access and inter-symbol interference) in a communication system, narrowband interference (including sine wave signals, autoregressive signals, digital signals in multi-speed signal systems, etc.) and environmental noise generated by narrowband communication systems are eliminated, and subspace decomposition techniques and auxiliary vectors are used to simplify the traditional detectors. Simulation results show that the detector has a bit error rate of about 3 dB lower than that of conventional detectors at a signal-to-noise ratio of 10 dB.