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A physical layer uplink and downlink processing method based on private network ofdma

A processing method and technology of the physical layer, applied in the uplink and downlink processing of the physical layer of OFDMA, can solve the problems of ineffective use of channel frequency selectivity and poor performance, and achieve the effect of reducing cost and product design and development cycle

Active Publication Date: 2018-11-16
深圳市极致汇仪科技有限公司
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Problems solved by technology

[0013] Although the use of SC-FDMA technology reduces the requirements for the dynamic range of the terminal's radio frequency, reduces the cost of the terminal, and improves the standby endurance of the terminal, however, from the perspective of receiving demodulation, its performance is inferior to that of OFDMA technology.
The reason is that OFDMA reception and demodulation is performed in the frequency domain. If the channel is frequency selective, its performance depends on subcarriers with deep fading, which can be avoided by using frequency domain scheduling; while SC-FDMA reception and demodulation is performed in time In the domain, and its signal is the average of the signal before IFFT, it cannot effectively use the channel frequency selectivity

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  • A physical layer uplink and downlink processing method based on private network ofdma
  • A physical layer uplink and downlink processing method based on private network ofdma
  • A physical layer uplink and downlink processing method based on private network ofdma

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] Some special application scenarios in the field of private networks, such as some border defense networks, military communication networks, enterprise networks, ad hoc networks, etc., are less sensitive to terminal costs, and often hope to learn from the existing mature network accumulation Develop a set of networks that can support internal mobile terminals, especially for the physical layer of the air interface access technology. As a high-speed mobile communication standard that is commercially available worldwide today, LTE has received a lot of research and demonstration on its technical evolution, and has accumulated quite a lot of technical solutions in the development of the physical layer. Therefore, for the above-mentioned network requirements, in the design of the physical layer, the downlink can completely borrow the standard...

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Abstract

The invention provides an OFDMA physical layer uplink and downlink processing method based on a private network. The method comprises an uplink processing method and a downlink processing method which are completely same, wherein the process of the uplink processing method comprises the steps of scrambling, modulation mapping, layer mapping, pre-coding, resource mapping and generation of OFDMA signals. The OFDMA physical layer uplink and downlink processing method based on the private network has the advantages that the uplink and downlink reception of the OFDMA physical layer is achieved, namely the same chips are used for the base station side and the terminal side for transmitting and receiving treatment, the cost and the design and development cycle of the product are reduced.

Description

technical field [0001] The invention relates to an uplink and downlink processing method, in particular to a private network-based OFDMA physical layer uplink and downlink processing method. Background technique [0002] Explanation of terms: [0003] LTE: Long Term Evolution. [0004] OFDMA: Orthogonal Frequency Division Multiple Access. [0005] SC-FDMA: Single Carrier Frequency Division Multiple Access. [0006] 3GPP: Third Generation Partnership Project. [0007] PAPR: peak-to-average ratio. [0008] BCP: Bit Accelerator. [0009] PUSCH: Physical Uplink Shared Channel. [0010] PDSCH: Physical Downlink Shared Channel. [0011] LTE is based on OFDMA technology, a global general mobile communication standard formulated by 3GPP, including FDD and TDD modes, which are used for paired spectrum and unpaired spectrum. The LTE physical layer standard protocol defines that the uplink adopts SC-FDMA technology instead of the downlink OFDMA technology. This is because the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L1/00
CPCH04L1/0013H04L1/0061H04L1/0071H04L27/2628H04L27/265
Inventor 吴帅刘海溶
Owner 深圳市极致汇仪科技有限公司