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Downlink pilot signal transmission method and device

A technology of pilot signal and transmission method, which is applied in the field of downlink pilot signal transmission and devices, and can solve problems such as channel estimation and demodulation performance adverse effects, affecting continuous transmission performance of big data services, etc.

Inactive Publication Date: 2021-05-25
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a downlink pilot signal transmission and device, which is used to overcome the problem that the use of short subframe design in the prior art is likely to cause adverse effects on channel estimation and demodulation performance, and at the same time affect the continuous transmission performance of large data services defect

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  • Downlink pilot signal transmission method and device
  • Downlink pilot signal transmission method and device
  • Downlink pilot signal transmission method and device

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] For ease of understanding, the technical terms involved in the present invention will first be described in detail below.

[0028] (1) The pilot frequency is that the OFDM symbol is a frequency domain sequence. The so-called frequency domain sequence is composed of points containing different components and the energy contained in the frequency points. Then the "pilot" in the subchannel of the OFDM symbol is actually a subchannel signal with a certain freque...

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Abstract

The present invention provides a downlink pilot signal transmission and device. In the method, the common pilot CRS is sent in the 0th symbol and the 4th symbol of the target optimized subframe, so that the target in each LTE downlink pilot subframe Optimizing subframes means that each TTI can be independently demodulated. In addition, the method provided by the present invention is provided with an 8-port DMRS sequence for data demodulation in each target optimized subframe, and can also support the transmission of channel state reference signal CSI-RS of several 8-port users, so In the case of a short TTI, it will not affect channel estimation and data demodulation, improving network performance.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a downlink pilot signal transmission and a device. Background technique [0002] LTE (Long Term Evolution, Long Term Evolution) system introduces OFDM (Orthogonal Frequency Division Multiplex, Orthogonal Frequency Division Multiplex) technology, and also supports two basic working modes, namely frequency division duplex (FDD) and time division duplex ( TDD). A typical LTE radio frame consists of 20 time slots with a length of 0.5 ms, two adjacent time slots form a subframe, and there are 10 subframes in total. In the LTE downlink subframe, when the conventional CP (conventional cyclic prefix) is used, one slot contains 7 OFDM symbols, so from the time domain, each subframe contains 14 OFDM symbols, and each symbol occupies 1 / 14ms. The content carried by the downlink subframe includes: pilot frequency, traffic channel, synchronization channel, including: PSCH (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/02H04L1/06
CPCH04L1/0675H04L25/0224H04L27/2601H04L27/2675
Inventor 金奕丹池连刚鲁智
Owner POTEVIO INFORMATION TECH CO LTD