Signal sending method for terminal device and terminal device

A MIMO OTA performance test system, comprising:

• a base station simulator, configured to send multiple streams of downlink test signals to a channel emulator through multiple downlink ports;
• the channel emulator, configured to:
• perform channel emulation processing on the multiple streams of received downlink test signals according to a complex number pattern of each of multiple receive antennas of a terminal device, a downlink radiation channel inverse matrix, and a specified downlink channel fading model, and
• send the multiple streams of processed downlink test signals to the terminal device in an anechoic chamber by using multiple downlink antennas in the anechoic chamber;
• and
• the terminal device, configured to:
• receive, by using the multiple receive antennas, the multiple streams of processed downlink test signals sent by the channel emulator, and
• feedback an acknowledgement message to the base station simulator according to each stream of received processed downlink test signal, wherein the acknowledgement message fed back according to the stream of processed downlink test signal includes information for facilitating notifying the base station simulator whether the terminal device correctly demodulates the processed downlink test signal, wherein
• the base station simulator is further configured to determine a downlink throughput of the terminal device according to a quantity of streams of downlink test signals that are sent and a quantity of pieces of acknowledgement information, among received acknowledgement messages, indicating that the terminal device performs correct demodulation.

A MIMO OTA performance test system, comprising:

• a terminal device in an anechoic chamber, configured to transmit multiple streams of uplink test signals by using multiple transmit antennas of the terminal device, and transmit the multiple streams of uplink test signals to a channel emulator through multiple uplink antennas in the anechoic chamber;
• the channel emulator, configured to perform channel emulation processing on the multiple streams of uplink test signals according to a complex number pattern of each of the multiple transmit antennas of the terminal device, the uplink radiation channel inverse matrix, and a specified uplink channel fading model, and send the multiple streams of processed uplink test signals to a base station simulator;
• and
• the base station simulator, configured to receive, through multiple uplink ports, the multiple streams of processed uplink test signals that are sent by the channel emulator, and determine an uplink throughput of the terminal device according to a quantity of streams of uplink test signals that are sent by the terminal device and a quantity of streams of processed uplink test signals that are received by the base station simulator.