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AWR2243 bảng dữ liệu(PDF) 38 Page - Texas Instruments |
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AWR2243 bảng dữ liệu(HTML) 38 Page - Texas Instruments |
38 / 62 page 9.3.1.2 Transmit Subsystem The AWR2243 transmit subsystem consists of three parallel transmit chains, each with independent phase and amplitude control. All three transmitters can be used simultaneously or in time-multiplexed fashion. The device supports binary phase modulation for MIMO radar and interference mitigation. For AWR2243, additional phase shifters are associated with Tx channels, and these can programmed on a per chirp basis. Each transmit chain can deliver a maximum of 13 dBm at the antenna port on the PCB. The transmit chains also support programmable backoff for system optimization. Figure 9-2 describes the transmit subsystem. û- 0/180° (from Timing Engine) 6 bits Loopback Path Fine Phase Shifter Control PCB 13dBm @ 50 Ÿ LO Self Test Figure 9-2. Transmit Subsystem (Per Channel) 9.3.1.3 Receive Subsystem The AWR2243 receive subsystem consists of four parallel channels. A single receive channel consists of an LNA, mixer, IF filtering, A2D conversion, and decimation. All four receive channels can be operational at the same time an individual power-down option is also available for system optimization. Unlike conventional real-only receivers, the AWR2243 device supports a complex baseband architecture, which uses quadrature mixer and dual IF and ADC chains to provide complex I and Q outputs for each receiver channel. The AWR2243 is targeted for fast chirp systems. The band-pass IF chain has configurable lower cutoff frequencies above 175 kHz and can support bandwidths up to 20 MHz. Figure 9-3 describes the receive subsystem. Self Test PCB 50 W GSG Loopback Path DAC DSM DSM RSSI I Q LO DAC Figure 9-3. Receive Subsystem (Per Channel) AWR2243 SWRS223A – FEBRUARY 2020 – REVISED AUGUST 2020 www.ti.com 38 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated Product Folder Links: AWR2243 |
Số phần tương tự - AWR2243_V01 |
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Mô tả tương tự - AWR2243_V01 |
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