name: LO
full_form: Local oscillator
context: Phase Shifter Phase shifters are source of imbalance and they can be implemented by power divisor and all â pass filters producing 90 degree phase shift. The accuracy depends on the components so that the 90 degree phase shift is not really exact. There are different phased-array architectures (i.e., RF phase shifters, LO phase shifters) which differ in functionality of phase shifting and signal combining and have as critical factors power consumption, losses and bandwidth. Possible examples of phase shifters (i.e., RF and LO phase shifters) can be seen in Figure 6.2.1.2.2.1-1. Figure 6.2.1.2.2.1-1: RF and LO Phase Shifters LO phase shifters - compared to RF phase shifter - has a LO path, which is less sensitive to bandwidth because single tone LO is usually delivered. Bandwidth only translates to conversion gain difference in the mixer while using different LO frequencies and can be compensated pushing up the gain in the LO driver. The penalty for this is the higher power
description: Local oscillator (LO) is a critical component in telecommunications, particularly in RF systems. It generates a single-tone signal used as a reference frequency for operations such as mixing and phase shifting. In 3GPP TS 38.803, LO is discussed in relation to phased-array architectures, highlighting its role in phase shifters and its impact on power consumption, losses, and bandwidth.
explanation: LO is classified as a Technology because it performs a technical function within telecommunications systems. It generates reference frequencies essential for operations like phase shifting, which are core technological aspects of RF systems and phased-array architectures.
section_title: 6.2.1.2.2.1TX Chain
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