name: SCH
full_form: Synchronization Channel
context: waveforms appear within the duration of one or multiple OFDM symbols. Thus, the SCH symbol timing is detected by taking the auto-correlation of N-1 periodic waveforms of the SCH in the time domain without information pertaining to the cell-specific SCH waveform. Hybrid of cross-correlation based detection and auto-correlation based detection A hybrid method is applicable to the hierarchical SCH. 7.1.2.4.6.2 Radio frame timing detection In the next step of the SCH-symbol timing detection, the radio frame timing must be detected when this is not directly given by the SCH timing, i.e., if the SCH is transmitted more than once every radio frame. There are three different options for radio frame timing detection: SCH based detection, BCH based detection, and reference signal-based detection. SCH based detection The SCH based detection is applicable to both the hierarchical SCH and non-hierarchical SCH. With SCH based detection, the radio frame timing can be estimated by detecting the
description: The Synchronization Channel (SCH) is a specific channel in the 3GPP specification used for cell search procedures and synchronization purposes. It involves the transmission of specific waveforms within one or multiple OFDM symbols, allowing for the detection of SCH symbol timing through auto-correlation methods. The SCH plays a crucial role in radio frame timing detection, which can be achieved through various options including SCH-based detection.
explanation: The context describes the SCH's function in cell search and synchronization, emphasizing its role in transmitting waveforms for timing detection within a cellular network. This aligns with the definition of a Channel entity type.
section_title: 7.1.2.4.6	Cell search procedure
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