A random access signal set design method based on zadoff-chu sequence

Abstract

The invention discloses a random access signal set design method based on a Zadoff-Chu sequence, comprising the following steps: Step 1: determining the timing uncertainty range H and the frequency offset range F; Step 2: within a given uncertainty range In the case of H and frequency offset range F, determine the set U RA , the set U RA is the set of root values ​​μ, and the root value μ is the selected root value that can be used to generate random access signals; Step 3: For the set U RA Any available root value μ in , determine the effective cyclic shift set K corresponding to the root value; Step 4: For U RA For each available root value μ, when generating set K, maximize the number of elements that set K can contain, so that the root value μ can generate the most orthogonal sequences. The present invention realizes the maximization of the number of cyclic shifts in the set K by detecting all cyclic shifts one by one, and provides a unified solution for the selection of the root value of the random access signal based on the Zadoff-Chu sequence and the generation of the cyclic shift set general scheme.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a Zadoff-Chu sequence-based random access signal set design method. Background technique [0002] In a wireless cellular communication system, random access signals are mainly used by user equipment (user equipment, UE) to perform initial access, obtain uplink synchronization, and transmit short messages. Since the system does not know which user equipment will send the random access signal and when to send it, it is impossible to reserve fixed dedicated resources for sending the random access signal for a specific user. Therefore, in a cellular communication system, common resources that do not need to be scheduled are often reserved periodically for these potential user equipments that need access to send random access signals. This shared resource is also called a physical random access channel (Physical Random Access Channel, PRACH). In order for the access p...

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Problems solved by technology

However, frequency offset other than this has not considered how to use ZC sequence to generate random access signal

Moreover, in the actual communication standard, there is no general random access signal generation scheme for any frequency offset or any frequency offset range.

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