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    • 69. 发明公开
    • 분산 네트워크에서의 주파수 동기화 방법
    • 分布式网络的频率同步方法
    • KR1020130109045A
    • 2013-10-07
    • KR1020130030015
    • 2013-03-20
    • 한국전자통신연구원
    • 김정현김지형김현재임광재권동승
    • H04W56/00
    • H04W56/001H04W56/0035
    • PURPOSE: A frequency synchronization method in a distributed network is provided to synchronize a carrier frequency of a node which enters a distributed network with a carrier frequency of the network which the node has entered by adjusting the carrier frequency of the node. CONSTITUTION: Preambles are received from a plurality of nodes which are adjacent to a node (S301). A carrier frequency offset of each node is estimated from the preambles (S302). The average of the estimated offsets is calculated (S304). An adjustment value of the carrier frequency of the whole adjacent nodes is calculated by using the average value (S308). A carrier frequency of the node is adjusted based on the adjustment value. [Reference numerals] (AA) No; (BB) Yes; (S301) Preamble reception; (S302) Frequency offset estimation for each neighboring node; (S303) Preamble reception number > R_th; (S304) Average frequency offset value {tilde over (f)}_i,m (k) calculation; (S305) {tilde over (f)}_i,m (k) calculation number (N_δ_i,m (k)) update; (S306) N_δ_n,l (k-1) and q_n,i (k-1) reception; (S307) Final frequency offset value ({circumflex over (f)}_i,m (k)) calculation; (S308) Carrier wave adjustment value (Δf_i (k)) calculation & adjustment; (S309) Carrier wave adjustment request value (q_i,n (k)) calculation; (S310) N_δ_i,n (k) and q_i,n (k) reception
    • 目的:提供分布式网络中的频率同步方法,通过调整节点的载波频率,将进入分布式网络的节点的载波频率与节点已进入的网络的载波频率进行同步。 构成:从与节点相邻的多个节点接收前导码(S301)。 从前导码估计每个节点的载波频率偏移(S302)。 计算估计偏移的平均值(S304)。 通过使用平均值来计算整个相邻节点的载波频率的调整值(S308)。 基于调整值调整节点的载波频率。 (附图标记)(AA)否; (BB)是的; (S301)前导码接收; (S302)每个相邻节点的频率偏移估计; (S303)前导码接收号码> R_th; (S304)平均频率偏移值{(t)),(i),(k)计算; (S305){tilde over(f)} _ i,m(k)计算号(N_δ_i,m(k))更新; (S306)N_δ_n,l(k-1)和q_n,i(k-1)接收; (S307)最终频率偏移值({f(f)} _ i,m(k))计算; (S308)载波调整值(Δf_i(k))计算和调整; (S309)载波调整请求值(q_i,n(k))计算; (S310)N_δ_i,n(k)和q_i,n(k)接收