CDMA系統(tǒng)中基于博弈論的功率速率聯(lián)合控制
發(fā)布時間：2019-04-10 17:29
【摘要】：為了傳輸與接收多媒體信息,第三代移動通信系統(tǒng)(3rd-Generation,3G)需要提供高比特速率的業(yè)務(wù)。從理論上來說,頻分多址(Frequency Division Multiple Access, FDMA)、時分多址(Time Division Multiple Aceess,TDMA)和碼分多址(Code Divsioin Multiple Aceess, CDMA)都能應(yīng)用在第三代移動通信中。由于在功率控制下的碼分多址通信系統(tǒng)有一些特有的優(yōu)點,如信道容量大、抗干擾性強以及傳輸功率小等。因而以WCDMA、CDMA2000為首的第三代移動通信系統(tǒng)都把CDMA技術(shù)作為其多址方案。由于多址干擾的原因,使得功率控制成為CDMA通信系統(tǒng)的關(guān)鍵技術(shù)。但是為了支持多業(yè)務(wù)的應(yīng)用服務(wù),單一的功率控制技術(shù)已難以進一步提高系統(tǒng)性能,聯(lián)合功率控制成為近年來研究的熱點。傳統(tǒng)的功率控制方法是面向語音業(yè)務(wù)服務(wù)的,可分為集中式與分布式功率控制。集中式功率控制算法指出了功率控制算法性能理論上的上限,實際中采用分布式算法,并用迭代算法實現(xiàn)。CDMA系統(tǒng)中的聯(lián)合功率控制過程可以看作是一個博弈過程,所有用戶通過調(diào)整它的傳輸功率與傳輸速率來最大化自己的效用值,最后達到納什均衡。本文先研究了CDMA蜂窩網(wǎng)下的功率控制問題,并提出了新的效用函數(shù),相對于以往的效用函數(shù),通過仿真表明,該算法使得用戶在較小的功率下獲得較高效用值。接著針對CDMA蜂窩系統(tǒng)中的多業(yè)務(wù)處理的飛速發(fā)展,采用非合作博弈(Non-cooperative Game, NG)理論實現(xiàn)功率與速率的聯(lián)合控制(Joint Control of Power and Rate, JCPR)。并且提出了一種基于時延花費的代價函數(shù),證明了該聯(lián)合算法納什均衡(Nash Equilibrium, NE)的存在性與唯一性。通過仿真表明,該算法使得用戶在較小的功率下獲得較高效用值,并且減少了用戶的傳輸延時。最后研究了認知無線電中的聯(lián)合功率和速率控制問題。將系統(tǒng)中的次級用戶間的關(guān)系假定為非合作的競爭性關(guān)系,同時考慮次級用戶對主用戶的干擾容限,提出了基于次級用戶的傳輸時延花費的非合作博弈聯(lián)合功率速率控制算法,并證明了該算法的納什均衡的存在性與唯一性。通過仿真表明,該算法使得用戶在使用較小的傳輸功率的情況下獲得較高效用值與較低的傳輸延時。同時使得次級用戶對主用戶的干擾小于干擾閾值。
[Abstract]:In order to transmit and receive multimedia information, the third generation mobile communication system (3G) needs to provide high bit rate services. Theoretically, both frequency division multiple access (Frequency Division Multiple Access, FDMA),) time division multiple access (Time Division Multiple Aceess,TDMA) and code division multiple access (Code Divsioin Multiple Aceess, CDMA) can be used in third generation mobile communication. Due to the power-controlled CDMA communication system has some unique advantages, such as large channel capacity, strong anti-interference and small transmission power. Therefore, the third generation mobile communication system headed by WCDMA,CDMA2000 takes CDMA technology as its multiple access scheme. Due to multiple access interference (mai), power control has become the key technology of CDMA communication system. However, in order to support multi-service applications, it is difficult for single power control technology to further improve the performance of the system. Joint power control has become a hot research topic in recent years. The traditional power control method is service-oriented for voice service, which can be divided into centralized and distributed power control. The centralized power control algorithm points out the theoretical upper bound of the performance of the power control algorithm. In practice, the distributed algorithm is used and the iterative algorithm is used. The joint power control process in CDMA system can be regarded as a game process. All users maximize their utility by adjusting their transmission power and transmission rate, and finally achieve Nash equilibrium. In this paper, the power control problem in CDMA cellular network is studied firstly, and a new utility function is proposed. Compared with the previous utility function, the simulation results show that the proposed algorithm enables users to obtain more efficient usage values at lower power. Then, in view of the rapid development of multi-service processing in CDMA cellular systems, a non-cooperative game (Non-cooperative Game, NG) theory) is used to realize the joint control of power and rate in (Joint Control of Power and Rate, JCPR). A cost function based on delay cost is proposed, and the existence and uniqueness of Nash equilibrium (Nash Equilibrium, NE) are proved. The simulation results show that the proposed algorithm can achieve high efficiency and reduce the transmission delay of users at low power. Finally, the joint power and rate control in cognitive radio is studied. The relationship between the secondary users in the system is assumed to be a non-cooperative competitive relationship, and considering the interference tolerance between the secondary users and the primary user, a joint power rate control algorithm based on the transmission delay cost of the secondary users is proposed. The existence and uniqueness of Nash equilibrium are proved. The simulation results show that the proposed algorithm enables the user to obtain higher efficiency and lower transmission delay when the transmission power is small. At the same time, the interference between the secondary user and the primary user is less than the interference threshold.
【學(xué)位授予單位】：復(fù)旦大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.533
本文編號：2455989
[Abstract]:In order to transmit and receive multimedia information, the third generation mobile communication system (3G) needs to provide high bit rate services. Theoretically, both frequency division multiple access (Frequency Division Multiple Access, FDMA),) time division multiple access (Time Division Multiple Aceess,TDMA) and code division multiple access (Code Divsioin Multiple Aceess, CDMA) can be used in third generation mobile communication. Due to the power-controlled CDMA communication system has some unique advantages, such as large channel capacity, strong anti-interference and small transmission power. Therefore, the third generation mobile communication system headed by WCDMA,CDMA2000 takes CDMA technology as its multiple access scheme. Due to multiple access interference (mai), power control has become the key technology of CDMA communication system. However, in order to support multi-service applications, it is difficult for single power control technology to further improve the performance of the system. Joint power control has become a hot research topic in recent years. The traditional power control method is service-oriented for voice service, which can be divided into centralized and distributed power control. The centralized power control algorithm points out the theoretical upper bound of the performance of the power control algorithm. In practice, the distributed algorithm is used and the iterative algorithm is used. The joint power control process in CDMA system can be regarded as a game process. All users maximize their utility by adjusting their transmission power and transmission rate, and finally achieve Nash equilibrium. In this paper, the power control problem in CDMA cellular network is studied firstly, and a new utility function is proposed. Compared with the previous utility function, the simulation results show that the proposed algorithm enables users to obtain more efficient usage values at lower power. Then, in view of the rapid development of multi-service processing in CDMA cellular systems, a non-cooperative game (Non-cooperative Game, NG) theory) is used to realize the joint control of power and rate in (Joint Control of Power and Rate, JCPR). A cost function based on delay cost is proposed, and the existence and uniqueness of Nash equilibrium (Nash Equilibrium, NE) are proved. The simulation results show that the proposed algorithm can achieve high efficiency and reduce the transmission delay of users at low power. Finally, the joint power and rate control in cognitive radio is studied. The relationship between the secondary users in the system is assumed to be a non-cooperative competitive relationship, and considering the interference tolerance between the secondary users and the primary user, a joint power rate control algorithm based on the transmission delay cost of the secondary users is proposed. The existence and uniqueness of Nash equilibrium are proved. The simulation results show that the proposed algorithm enables the user to obtain higher efficiency and lower transmission delay when the transmission power is small. At the same time, the interference between the secondary user and the primary user is less than the interference threshold.
【學(xué)位授予單位】：復(fù)旦大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.533
【參考文獻】
相關(guān)碩士學(xué)位論文 前1條
1 張艷平;碼分多址移動通信系統(tǒng)中功率速率聯(lián)合控制方法研究[D];浙江大學(xué);2004年
，本文編號：2455989
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