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This paper presents a novel digital beamforming to improve channel quality. By estimating the received channel impulse response (CIR) to calculate the arrival of angle (AOA) of received signal, and we scan the AOA to adjust the weighting vector of received signal and improve the channel quality. The performance of system with digital beamforming can improve 16 dB signal to noise ratio (SNR) in non-line of sight (NLOS).Index Terms-channel quality, digital beamforming, CIR, AOA, weighting vector.

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RF self-measurement is an important procedure when the system started up to ensure wireless transceiver reliably. We propose an online RF self-measurement in Xilinx Zynq (Zedboard) with RF (AD-FMCOMMS1-EBZ) to measure the radio frequency (RF) quality, in terms of Bit Error Rate (BER), Image Rejection Ratio (IRR), Signal-to-Noise Ratio (SNR), Error Vector Magnitude (EVM) and Noise Figure (NF). The measured results match theoretical simulations.