Conventional telemetry are mostly applied in outside scenes. Usually, it is line of sight transmission, except for the scene of low elevation reception for a short time in the process of takeoff or landing, and the property of transmission channel is similar to the Gaussian White Noise channel. With the development of telemetry applications, telemetry in enclosed scenario is required. The application mode and channel conditions have changed greatly. Aimed at enclosed application, the challenges of telemetry receiver are analyzed. A new scheme of diversity and relay reception based on Dual-antenna and blind equalization is proposed. The problem of telemetry link interruption in this scenario is solved effectively. The scheme has successfully put into practice. The experimental results show that the proposed scheme can greatly improve the stability of the telemetry system.