Method and apparatus to enable low power synchronization for large bandwidth wireless LAN systems

Abstract

In a wireless communication system, a transmitter and a receiver implement low power synchronization techniques. The transmitter transmits a packet that includes a two-part preamble. A first part of the two-part preamble is transmitted at a first reduced bandwidth that is smaller than a second bandwidth of the channel, and at least one of a second part of the two-part preamble and another portion of the packet is transmitted at the second bandwidth of the channel. The receiver includes an interleaved analog-to-digital converter (ADC) including multiple sub-ADCs. The receiver turns on a first subset of the multiple sub-ADCs during an idle listening period, and turns on a second subset of the multiple sub-ADCs upon detection of a completion of the first part of the two-part preamble, wherein the first subset of the multiple sub-ADCs is less than the second subset of the multiple sub-ADCs.

Description

technical field [0001] The present application relates generally to physical layer design aspects in wireless communication systems, and more particularly, to synchronization in high bandwidth wireless local area network (LAN) systems. Background technique [0002] A wireless LAN system, such as a wireless LAN system based on the Institute of Electrical and Electronics Engineers (IEEE) standard 802.11, is, for example, a packet-based communication system in which the entire information to be transmitted from a transmitter to a receiver is encoded in packets. A packet includes a preamble for synchronization, a header providing information about the content of the data, and a payload including the information to be transmitted. In current wireless local area network (LAN) systems, preambles, headers, and payloads are time multiplexed in packets and occupy the entire channel bandwidth for transmission and reception. [0003] In the unscheduled mode of operation using Carrier S...

AI Technical Summary

Problems solved by technology

This unscheduled mode of operation is called "idle listening" and affects power consumption due to the continuous scanning of access points (APs) or other devices in the network for transmissions

For large bandwidth systems (for example, gigahertz (GHz) bandwidth), high-speed analog-to-digital converters (ADCs) are required for operation, and high-speed analog-to-digital converters can consume most of the idle listen mode power consumption

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