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    • 13. 发明申请
    • Dynamic differentiated link adaptation for ultra-wideband communication system
    • 用于超宽带通信系统的动态差分链路适配
    • US20050201446A1
    • 2005-09-15
    • US11075254
    • 2005-03-08
    • Yeheskel Bar-NessJordi Diaz
    • Yeheskel Bar-NessJordi Diaz
    • H04B1/69
    • H04B1/7183H04B1/7176H04B1/719
    • Optimum usage of time diversity and significantly higher data rates are achieved by utilizing an adaptive Ultra-wideband impulse radio (UWB IR) transmission scheme based upon information about the channel state at a particular time instant. Through the use of channel state information, the transmission scheme is adjusted for the particular channel state. In particular, the system is adapted dynamically for each user by varying the number of pulses transmitted per bit in response to the channel state. The channel state is a dynamic parameter of the transmission system that is typically measured or estimated by the receiver. An adaptation element responds to the channel state information to determine a desired number of pulses per bit to be utilized in a transmission channel for subsequent UWB IR communication. This desired number of pulses per bit is then supplied to and used by an adaptive transmitter for subsequent transmission by a particular mobile station.
    • 通过利用基于在特定时刻的信道状态的信息的自适应超宽带脉冲无线电(UWB IR)传输方案来实现时间分集和显着更高数据速率的最佳使用。 通过使用信道状态信息,针对特定信道状态调整传输方案。 特别地,通过响应于信道状态改变每比特发送的脉冲数,系统针对每个用户动态地适配。 信道状态是通常由接收机测量或估计的传输系统的动态参数。 适应元件响应于信道状态信息,以确定用于随后的UWB IR通信的传输信道中要利用的每个位的所需脉冲数。 然后将每个位的所需数量的脉冲提供给自适应发射机并由特定移动台进行后续传输。
    • 18. 发明授权
    • Dynamic differentiated link adaptation for ultra-wideband communication system
    • 用于超宽带通信系统的动态差分链路适配
    • US07386045B2
    • 2008-06-10
    • US11075254
    • 2005-03-08
    • Yeheskel Bar-NessJordi Diaz
    • Yeheskel Bar-NessJordi Diaz
    • H03K7/08H03K7/04
    • H04B1/7183H04B1/7176H04B1/719
    • Optimum usage of time diversity and significantly higher data rates are achieved by utilizing an adaptive Ultra-wideband impulse radio (UWB IR) transmission scheme based upon information about the channel state at a particular time instant. Through the use of channel state information, the transmission scheme is adjusted for the particular channel state. In particular, the system is adapted dynamically for each user by varying the number of pulses transmitted per bit in response to the channel state. The channel state is a dynamic parameter of the transmission system that is typically measured or estimated by the receiver. An adaptation element responds to the channel state information to determine a desired number of pulses per bit to be utilized in a transmission channel for subsequent UWB IR communication. This desired number of pulses per bit is then supplied to and used by an adaptive transmitter for subsequent transmission by a particular mobile station.
    • 通过利用基于在特定时刻的信道状态的信息的自适应超宽带脉冲无线电(UWB IR)传输方案来实现时间分集和显着更高数据速率的最佳使用。 通过使用信道状态信息,针对特定信道状态调整传输方案。 特别地,通过响应于信道状态改变每比特发送的脉冲数,系统针对每个用户动态地适配。 信道状态是通常由接收机测量或估计的传输系统的动态参数。 适应元件响应于信道状态信息,以确定用于随后的UWB IR通信的传输信道中要利用的每个位的所需脉冲数。 然后将每个位的所需数量的脉冲提供给自适应发射机并由特定移动台进行后续传输。
    • 20. 发明申请
    • TRANSMIT POWER ADAPTATION FOR CDMA COMMUNICATION SYSTES USING SUCCESSIVE INTERFERENCE CANCELLATION
    • 发射功率适配CDMA通信系统使用连续干扰消除
    • US20050207475A1
    • 2005-09-22
    • US11076751
    • 2005-03-10
    • Yeheskel Bar-NessYe Lee
    • Yeheskel Bar-NessYe Lee
    • H04B1/707H04B7/005
    • H04B1/71072H04B2201/70706H04W52/16H04W52/248
    • Transmit power adaptation for DS/CDMA systems is disclosed for a CDMA system that utilizes a successive interference cancellation receiver on fading channels. The transmission power is adapted in response to channel variations to achieve an arbitrary power profile for received signal powers at the system base station. That is, the received signal powers are distributed with some factor xi's given as: SRi=SR(l)xi, (i=2,3, . . . , K and xl=1) where K is the number of users and SR(i) is the received signal power of the user having the ith strength, and wherein user strengths are ranked in the order of estimated channel gains. The factor xi gives a measure of the disparity between the received power levels. The channel is estimated at both the transmitter and receiver. In one embodiment, the factors, xi, for distributing the signal powers are selected such that the average BER for each user is minimized. In another embodiment, the factors, xi, for distributing the signal powers are selected such that, after successive interference cancellation, an instantaneous BER for all users is equal.
    • 对于在衰落信道上利用连续干扰消除接收机的CDMA系统,公开了用于DS / CDMA系统的发射功率适配。 传输功率是响应于信道变化而适应的,以实现系统基站处的接收信号功率的任意功率分布。 也就是说,接收的信号功率以给定的一些因子x分配:<?in-line-formula description =“In-line Formulas”end =“lead”?> S < (i = 2,...,i),(i) 3,...,K和x L1 = 1)<?in-line-formula description =“In-line Formulas”end =“tail”?>其中K是用户数, (i)是具有第i个强度的用户的接收信号功率,并且其中用户强度按照 估计渠道收益。 因子x i i给出了接收功率电平之间的差异的度量。 在发射机和接收机两者估计信道。 在一个实施例中,选择用于分配信号功率的因子,使得每个用户的平均BER被最小化。 在另一个实施例中,选择用于分配信号功率的因子,使得在连续干扰消除之后,所有用户的瞬时BER相等。