SIGNAL TRANSMISSION METHOD AND APPARATUS

The embodiments of the present application relate to the technical field of communications. Disclosed are a signal transmission method and apparatus, which can improve the correlation of preamble symbols after spread spectrum. The method comprises: firstly, performing spread spectrum on a preamble symbol according to a first spread spectrum code sequence, so as to generate a first signal, and then sending the first signal to a receiving end. The first signal is used for determining a channel impulse response; the first spread spectrum code sequence comprises a plurality of spread spectrum code groups; each spread spectrum code group comprises a plurality of same spread spectrum codes and at least one protection symbol; the first place and/or the last place of each spread spectrum code group is the protection symbol; and the plurality of spread spectrum code groups comprise at least two spread spectrum code groups with different spread spectrum codes. Les modes de réalisation de la présente demande se rapporte