基于GRT平台的全双工WiFi设计与实现

[摘要] 提出了一种基于GRT平台的全双工WiFi通信系统设计和实现，它可以支持20 MHz的带宽，能够提供不同的调制/解调方式，包括802.11a/g模式中的标准二进制相移键控（BPSK）、正交相移键控（QPSK）、16 正交振幅调制（QAM）和64 QAM调制。测试结果显示：基于GRT的全双工系统的吞吐率可以达到92.45 Mbit/s，相当于802.11a/g标准吞吐率的1.7倍，两帧之间的延迟可以低至9.85 μs。

[关键词] 全双工；WiFi；软件定义无线电；吞吐率

[Abstract] In this paper, we propose the full-duplex WiFi design and implementation based on GRT platform. The system supports 20 MHz bandwidth operation, and offers various modulation/demodulation schemes, including binary phase shift keying (BPSK), quadrature phase shift keyin (QPSK), 16 QAM, and 64 quadrature amplitude modulation (QAM), for standard 802.11a/g frames in the full-duplex mode. Our system further delivers throughput up to 92.45 Mbit/s, about 1.7 times compared with the half-duplex 802.11a/g standards, and the frame interaction intervals can be as small as 9.85 us.

[Keywords] full duplex; WiFi; software defined radio (SDR); throughput