Method for solving non-controllability of terminal's power spectrum density in OFDMA system

A method for solving non-controllability of OFDMA system terminal's power spectrum density, wherein the method comprises the following steps:

• 1) determining, by AMC module at base station side, modulation coding method of a terminal according to uplink receiving SNR (Signal to Noise Ratio);
• 2) determining, by a power control module at the base station side, carrier transmit power regulating value of the terminal according to the uplink receiving SNR and the modulation coding method determined in Step 1);
• 3) determining a maximum carrier number that can be allocated to the terminal according to the carrier transmit power regulating value determined in Step 2), the terminal's carrier transmit power reported by the terminal, and a maximum total transmit power of the terminal;
• 4) allocating, by a dispatching module, uplink time-frequency channel resources to the terminal according to service requirements, the modulation coding method determined in Step 1) and the maximum carrier number determined in Step 3);
• 5) sending to the terminal, via downlink link, the modulation coding method determined in Step 1), the carrier transmit power regulating value determined in Step 2), and the uplink time-frequency channel resource allocated in Step 4;
• 6) implementing, by the terminal, the carrier transmit power regulating value and the modulation coding method and sending data according to information sent in Step 5).