Channel allocation method for resisting multi-user interference
A technology of multi-user interference and channel allocation, applied in wireless communication, multi-frequency code system, advanced technology, etc., can solve problems such as serious interference, achieve the effect of reducing cost and ensuring common interests
Inactive Publication Date: 2012-09-26
吴秀荣 +5
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Problems solved by technology
[0015] The technical problem to be solved by the present invention is to provide a channel allocation method against multi-user interference, which overcomes the problem in the prior art that when the power difference between users is large, if the interference between sub-carriers is serious, users with high power The interference caused will seriously affect the low-power users, so that the interference generated by high-power users will not affect low-power users
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[0035] The core idea of the present invention is to allocate high-power user data and low-power user data to different time zones respectively, so as to avoid the existence of high-power users and low-power users in the same time zone, and the composition is similar to Figure 4 of this distribution.
[0036]In the prior art, for example, for the uplink frame structure of the pusc mode of the wimax system of the 802.16e protocol, each user is allocated burst (burst) data, and the most basic unit of burst data allocation is slot (time slot) ), for the uplink distributed pusc permutation method, one slot refers to one or more sub-channels, one sub-channel includes 3 ofdm symbols, and each slot has 48 data sub-carriers. The mapping method of uplink data includes the following steps:
[0037] 1. Divide the data into the size of the slot;
[0038] 2. Each slot should span one or more subchannels in the frequency domain, occupy one or more symbols in the time domain, and map the...
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The invention discloses a channel allocation method for resisting multi-user interference. The method is used for respectively allocating user data with high power and user data with low power to different time zones. Particularly, the method comprises the following steps: sorting every burst in the zone according to the power size; calculating the difference value of the powers of the burst withthe highest power and the burst with the lowest power in the zone, comparing the difference value with the tolerance of the user power difference in the system; and if the difference value is greaterthan the tolerance, carrying out the half-and-half division of the zone: dividing the zone into two zones with each zone accounting for half of the symbols of the original zone, allocating the burstswith low power to the same zone, and allocating the bursts with high power to the other zones. Through the zone divided according to the size of power, the method can prevent the user data with low power from being interfered by the user data with high power, thereby ensuring the common interest of all users.
Description
technical field [0001] The invention relates to the field of digital communication, in particular to a channel allocation method against multi-user interference. Background technique [0002] From 2G to 3G, the mobile communication system is now focused on 3.5G technology based on OFDM (Orthogonal Frequency Division Multiplexing) technology, and the traditional 3G technology plus OFDM and MIMO (Multiple Input Output) technology evolution 4G performance, it can be seen that OFDM technology is now a hot technology in all communication systems. [0003] OFDM is a high-speed transmission technology in a wireless environment. In traditional frequency division multiplexing, the frequency band is divided into several non-overlapping sub-bands to transmit parallel data streams, and guard bands are reserved between sub-channels. In OFDM technology, each sub-carrier is orthogonal to each other, allowing the spectrum of sub-channels to overlap each other, so the OFDM system can maxim...
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IPC IPC(8): H04W16/10H04W16/14H04W72/08H04L27/26H04W72/54
CPCY02B60/50Y02D30/70
Inventor 曾立任唯贤
Owner 吴秀荣