Signal processing method, communication apparatus, communication system, and storage medium

A terminal device, comprising:

• at least one processor;
• and
• a memory coupled to the at least one processor and having program instructions stored thereon which, when executed by the at least one processor, cause the at least one processor to:
• generate, in the terminal device, a first sequence, wherein the first sequence comprises a preamble sequence, the preamble sequence is a second sequence, the second sequence is an m-sequence, and the m-sequence is obtained by combining a primitive polynomial x3+x2+1 and an initial value [1, 0, 0];
• modulate the first sequence to obtain a first uplink signal;
• and
• transmit the first uplink signal to a network device.

A network device, comprising:

• at least one processor;
• and
• a memory coupled to the at least one processor and having program instructions stored thereon which, when executed by the at least one processor, cause the at least one processor to:
• receive a first signal, wherein the first signal is transmitted to the network device over a communication network from a terminal device;
• and
• determine a location of a preamble sequence in the first signal, wherein the preamble sequence is a second sequence, the second sequence is an m-sequence, and the m-sequence is obtained by combining a primitive polynomial x3+x2+1 and an initial value [1, 0, 0].