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The digital channelized receiver is an efficient way to deal with the problem how to receive signals arriving simultaneously in electronic reconnaissance receiver [11] $\eta$ . An Wideband digital channelized receiver based on weighted overlap-add (WOLA) filterbanks structure is derived from polyphase discrete Fourier transform (PDFT) filter digital channelized receiver. Adaptive double threshold detection method is apply to channel signal detection. Simulation result of the channelized receiver is given. A wideband digital channelized receiver has 2.4Gsps sampling rate and 64 channels channelized with the hardware platform consists of high speed analog-digital converter and high performance field programmable gate arrays. The results show that the design is available and effective.

Wideband Wide-Scan antenna system has been widely used in electronic reconnaissance domain. In view of this requirement, a wideband wide-scan phased array system based on Rotman lens is proposed. In this paper, the design of the system is introduced in detail, and a method of optimization and calibration for the system is proposed. The test results show that the method eliminates the amplitude phase error caused by the Rotman lens and solves the problem of the state change of the device used in system. The system can achieve $\pm 45^{\circ}$ scan angle in the range of 8-12GHz, it's mean side-lobe is less than −25dB. The application result show that the system has quite strong ability of anti-jamming and coverage of space domain.

Ongoing advances in digital-array technology have led to the development in fields such as radio astronomy, radar, and deep-space exploration. In this paper, we introduce the world's largest synthesis radio telescope, the Square Kilometer Array (SKA), and new-generation radio-telescope devices. We analyze the characteristics and performance advantages of digital-array system architecture in radio telescopes. We discuss in detail three kinds of low-frequency aperture-array system architecture based on the SKA work package in KLAASA, and we present a practical system scheme.