What modulation methods does uplink support in lte system?

LTE system is a universal mobile communication standard, which supports multiple modulation methods to realize high-speed data transmission. In LTE system, uplink transmission mainly adopts SC-FDMA technology, and also supports multiple modulation modes. This paper will introduce which modulation methods are supported by uplink in LTE system.

QPSK modulation

QPSK is a basic digital modulation method. By mapping two bits to one symbol, higher data transmission rate can be achieved. In LTE system, QPSK modulation is mainly used for low-speed data transmission, such as control signaling and short messages. QPSK modulation is simple and reliable, but the data transmission rate is relatively low.

16QAM modulation

16QAM is a high-order digital modulation method, which maps four bits to one symbol, and can achieve higher data transmission rate. In LTE system, 16QAM modulation is mainly used for medium-speed data transmission such as audio and video. The advantage of 16QAM modulation is high data transmission rate, but it requires high channel quality and is easily affected by interference and fading.

64QAM modulation

64QAM is a high-order digital modulation method, which maps six bits to one symbol, and can achieve higher data transmission rate. In LTE system, 64QAM modulation is mainly used for high-speed data transmission, such as downloading large files and high-definition videos. The advantage of 64QAM modulation is the highest data transmission rate, but it requires very high channel quality and is easily affected by interference and fading.