Method and system for signal generation

Abstract

The invention provides a method and a system for signal generation for performing additive synthesis of waveforms with different sampling frequencies with a small memory in a short period of time. Among communication standards of wave-synthesis objects, the communication standards of sampling frequencies in integral multiple relationship are grouped, and pre-synthesized waveforms (S1) are generated by performing sampling frequency synthesis in advance and then additive synthesis, as external signal waveforms, to generate waveforms (S2) that do not belong to the communication standards of groups and are stored in memories (S3). In addition, when the pre-synthesized waveforms and the external signal waveforms (S4) of groups are read from the memories, all signals are subjected to rate conversion processing by a digital filter to have the common sampling frequency (S5) and then under additive waveform synthesis, and thus high-frequency test signals (S7) underwent synthesized signal waveform quadrature modulation.

Description

technical field [0001] The present invention relates to a system for performing a test of a base station supporting a plurality of standards or a device used in the base station, and to a method for reducing the number of waveforms required to be transmitted for addition processing of waveforms having different sampling rates according to the standards A technology that reduces the memory capacity and shortens the time required for waveform generation. Background technique [0002] Communication standards for mobile terminals are being advanced every year, but the standards also differ depending on the carriers that provide services, resulting in a situation where multiple standards are mixed. [0003] In order to cope with this situation, it is required to be able to correspond to the so-called multi-standard that supports multiple standards with one base station. Even in 3GPP, it is regarded as Multi-Radio Standard, and TS37.104 / 37.141 specifies support for E-UTRA (LTE ),...

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Problems solved by technology

[0009] Therefore, since a signal combining these three standards is generated as one waveform pattern, it may be difficult to match the sampling rate of E-UTRA, UTRA, and GSM (registered trademark) / EDGE to the cycle of the signal, and the size of the generated waveform may change. Large, time-consuming to generate, cannot be accommodated in the memory of the signal generator, etc.

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