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Multi-chip tx beamforming for per-packet switching without lo phase alignment circuitry

A phase relationship, frequency divider technology, applied in synchronous signal speed/phase control, electrical components, reducing electrical interference, etc., can solve problems such as leakage power, wireless radio performance degradation, etc.

Active Publication Date: 2018-06-08
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the frequency synthesizer is coupled to both the TX chain and the RX chain of the wireless radio, the propagation of the LO signal from the frequency synthesizer to the TX chain and / or the RX chain may be undesirable to one or the other of the TX chain and / or the RX chain. Leakage of power in multiple circuits, which in turn can degrade the performance of the wireless radio

Method used

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  • Multi-chip tx beamforming for per-packet switching without lo phase alignment circuitry
  • Multi-chip tx beamforming for per-packet switching without lo phase alignment circuitry
  • Multi-chip tx beamforming for per-packet switching without lo phase alignment circuitry

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Embodiment Construction

[0021] Example embodiments are described below in the context of a WLAN system for simplicity only. It should be appreciated that the example embodiments are equally applicable to other wireless networks (e.g., cellular, pico, femto, satellite) and to wireless networks using one or more wired standards or protocols (e.g., Ethernet and / or home plug / PLC standard) for the signal system. As used herein, the term "WLAN" and may include those regulated by the IEEE 802.11 family of standards, (Bluetooth), HiperLAN (a collection of wireless standards comparable to the IEEE 802.11 standard used mainly in Europe) and other technologies with relatively short wireless propagation distances dominate the communication. Accordingly, the terms "WLAN" and "Wi-Fi" may be used interchangeably herein. Additionally, although described below in terms of an infrastructure WLAN system including one or more APs and some STAs, the example embodiments are equally applicable to other WLAN systems in...

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Abstract

A wireless communications device that produces phase-synchronized local oscillator (LO) signals without dedicated LO phase alignment circuitry. The wireless communications device includes a first transceiver chain to receive a first timing signal and a second transceiver chain to receive the first timing signal and a second timing signal. The first transceiver chain includes a first frequency divider to convert the first timing signal to a first LO signal. The second transceiver chain includes a second frequency divider to convert the first timing signal to a second LO signal, a third frequency divider to convert the second timing signal to a third LO signal, and a multiplexer to select either the second LO signal or the third LO signal for transmitting wireless signals via the second transceiver chain based at least in part on an operating mode of the wireless communications device.

Description

technical field [0001] Example embodiments relate generally to transmit beamforming, and more specifically, example embodiments relate to systems and methods for implementing transmit beamforming using multiple wireless radios without phase alignment circuitry. Background technique [0002] A frequency synthesizer can generate a high frequency local oscillator (LO) signal based on a lower frequency reference signal. The LO signal generated by the frequency synthesizer can be used by the wireless radio of the communication device to transmit and / or receive data signals. For example, the transmit (TX) chain of a wireless radio may use an LO signal to upconvert a data signal from a baseband frequency to a carrier frequency, and the receive (RX) chain of a wireless radio may use an LO signal to upconvert a received data signal from a carrier frequency to Downconvert to baseband frequency. The carrier frequency may be the frequency at which data signals are transmitted between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/04H04B15/06
CPCH04B15/06H04L7/04H04L7/0087H04B1/40H04L7/0091
Inventor H·朴S·阿布杜拉希-阿利别克
Owner QUALCOMM INC