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A method, device and system for sending and receiving a preamble sequence

A technology of a preamble sequence and a transmission method, applied in the field of communication, can solve the problems of frequency offset estimation deviation, the preamble sequence does not have anti-multipath interference, and the operation of carrier frequency error estimation is complicated.

Active Publication Date: 2019-01-15
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present invention provides a method, device and system for sending and receiving a preamble sequence, which solves the problem that the preamble sequence in the prior art does not have the performance of anti-multipath interference, which causes complex operation and low frequency when the receiving end performs carrier frequency error estimation. The problem of large deviations in partial estimates

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  • A method, device and system for sending and receiving a preamble sequence
  • A method, device and system for sending and receiving a preamble sequence
  • A method, device and system for sending and receiving a preamble sequence

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Embodiment Construction

[0085] The embodiment of the present invention provides a method, device and system for transmitting and receiving a preamble sequence, which is applied to a DOCSIS single-carrier modulation system. By adding a prefix and a suffix to the frequency offset estimation sequence at the transmitting end, the frequency offset estimation sequence resistance is improved. The performance of path interference reduces the influence of multipath channels on frequency offset error estimation.

[0086] The technical solution of the present invention will be described below with reference to the drawings and various embodiments of the specification.

[0087] The embodiment of the present invention provides a method for sending a preamble sequence, see Figure 4 As shown, the implementation process of this method is as follows:

[0088] Step 41: The transmitting end generates a frequency offset estimation sequence, the frequency offset estimation sequence includes N subsequences of length M, where N ...

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Abstract

The present invention provides a method, device and system for sending and receiving a preamble sequence, wherein the method for sending a preamble sequence is: the sending end generates a frequency offset estimation sequence, and the frequency offset estimation sequence includes N subsequences with a length of M , N is a positive integer greater than or equal to 2, and M is a positive integer; the sending end generates a prefix and a suffix based on the frequency offset estimation sequence; the sending end adds the A prefix and a suffix form a preamble; the prefix and suffix are used for anti-multipath interference; the sending end adds the preamble sequence to the data packet and sends it to the receiving end. The method provides a frequency offset estimation sequence with stronger anti-multipath interference performance by adding a prefix and a suffix to the frequency offset estimation sequence at the sending end.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device and system for sending and receiving a preamble sequence. Background technique [0002] The Data over Cable System Interface Specification (DOCSIS) standard defines a protocol that manages the transmission of data in a hybrid fiber coaxial cable network (Hybrid Fiber Coaxial, HFC). figure 1 Describes the high-level architecture of the coaxial network. The coaxial network is mainly composed of the following two devices: Cable Modem Terminal System (CMTS) and Cable Modem (CM). CM is a relatively cheap device that is deployed on the user side on a large scale for users to access the network; CMTS is a relatively complex structure and relatively expensive device that is deployed in the cable operator's computer room. The data link from CMTS to CM is called downlink, and the data link from CM to CMTS is called uplink. The following is an example of the upl...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L45/24
CPCH04L27/2607H04L27/2613H04L27/2657H04L27/2675H04L25/022H04L25/085H04L45/24H04L69/22
Inventor 司小书欧阳涛王凡徐兴利
Owner HUAWEI TECH CO LTD
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