System and method for sending preamble signal

Abstract

The invention provides a sending and receiving systems and methods of a preamble signal. The sending system comprises a first time-domain base symbol generation module, a second time-domain base symbol generation module, a cascade expansion module, a signaling frame / data frame cascade module, and an RF transmission module. The first time-domain base symbol generation module is used for generating a first time-domain base symbol A with the length N; the second time-domain base symbol generation module is used for generating a second time-domain base symbol B with the length M; the cascade expansion module is used for realizing cascade expansion of the first time-domain base symbol A and the second time-domain base symbol B with random lengths by using [A B B A] as a minimum unit so as to form a preamble symbol; the signaling frame / data frame cascade module is used for realizing cascaded connection of signaling frames or data frames after the preamble symbol to form a preamble base band frame; and the RF transmission module is used for modulating the preamble base band frame into a radio frequency signal for transmission. Therefore, the timing estimating performance can be improved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a system and method for sending and receiving a preamble signal. Background technique [0002] In a wireless network such as an ad hoc network (Ad Hoc Network), before an initial link is established, both communicating parties do not know the frequency point for sending a signal. At this time, the transmitting end generally sends a paging preamble signal at its working frequency first, so that the receiving end can complete the acquisition of the paging preamble signal within a certain acquisition time window. The capture time window is generally much smaller than the length of the paging preamble signal, so as to ensure that the receiving end can make its capture time window within the duration of the paging preamble signal when traversing and searching multiple different frequency points. Since the frequency point used by the paging preamble signal to be c...

AI Technical Summary

Problems solved by technology

[0010] (1) The resulting peak plateau will lead to ambiguity in timing estimates;

Images