A method and system for implementing an improved tdd-lte central DC subcarrier
A DC sub-carrier technology, applied in the modulation carrier system, transmission system, multi-frequency code system, etc., can solve the problems of reducing spectrum utilization, inability to guarantee the orthogonality of sub-carriers in frequency shift networking, and increasing interference. Achieve the effect of improving spectrum utilization, improving orthogonality and reducing interference
Active Publication Date: 2021-05-25
DINGLI COMM
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[0013] In the LTE protocol, the width of the central DC subcarrier is 7.5KHz, which is significantly different from the LTE standard subcarrier width of 15KHz. Even if the interval between the center frequency points of adjacent cells meets the requirement of integer multiples of 15KHz, the frequency shift group cannot be guaranteed. The orthogonality of subcarriers between adjacent cells in the network increases the interference between each other (in the case of same-frequency or different-frequency networking, this difference will not affect the orthogonality of subcarriers in adjacent cells), which indirectly reduces Spectrum Utilization
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[0043] The present invention will be described in detail below with reference to the drawings and examples, wherein the specific examples should not be construed as limiting the scope of the present invention.
[0044] In order to solve the interference problem of frequency overlap between cells in frequency shifting networking and improve the orthogonality of subcarriers between adjacent cells, the present invention proposes a method for implementing an improved TDD-LTE central DC subcarrier, referring to figure 1 Shown is a block diagram of method steps, in one embodiment, the method according to the present invention comprises the following steps:
[0045] (S1): Configure the wireless frame structure of TDD-LTE;
[0046] (S2): Set the base station transmission center frequency, so that the center frequency points of the transmission signals of adjacent cells are greater than a predetermined frequency point interval, and are an integer multiple of an LTE standard subcarrier...
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A method for realizing an improved TDD-LTE central DC subcarrier, comprising the steps of: configuring the wireless frame structure of TDD-LTE; setting the base station to transmit the central frequency so that the central frequencies of the transmitted signals of adjacent cells are greater than a predetermined The frequency interval is an integer multiple of an LTE standard subcarrier width; the central DC subcarrier width in the baseband signal is adjusted to be consistent with the LTE standard subcarrier width. The invention also discloses a system for realizing the improved TDD-LTE central DC sub-carrier corresponding to the method. The present invention can effectively improve the orthogonality of the subcarriers of the adjacent sub-carriers in the frequency shift networking, reduce interference, facilitate the front-line optimization personnel to formulate optimization plans and implement optimization adjustments, and can improve spectrum utilization in a large area and range, which is easy to implement and has good performance. Application prospect and market value.
Description
technical field [0001] The present invention relates to the field of mobile communication, more specifically, to a method and system for implementing an improved TDD-LTE central DC subcarrier, which can be applied to wireless mobile communication full-band related equipment, including but not limited to TDD-LTE wireless mobile Communication base station equipment (ENODEB), TDD-LTE wireless mobile communication terminal. Background technique [0002] With the continuous popularization of smart phones, the amount of information and data that people need to interact with mobile Internet is increasing day by day, and the contradiction between data traffic and tariffs is also intensifying. Improving spectrum utilization is an important means to effectively solve this contradiction. Advances in chip manufacturing technology It provides hardware support for the realization of FFT (Fast Fourier Transform) and OFDM (Orthogonal Frequency Division Multiplexing) technologies, and the fo...
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IPC IPC(8): H04W16/02H04W16/18H04L27/26H04L5/00
CPCH04L5/0053H04L27/2602H04W16/02H04W16/18
Inventor 余沫明
Owner DINGLI COMM