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1)  space time-orthogonal frequency division multiplex(ST-OFDM)
ST-OFDM
2)  orthogonal frequency division multiplexing(OFDM)
OFDM
1.
Combining the adaptive bit and power allocation with spacial diversity,an orthogonal frequency division multiplexing(OFDM) scheme is described in this paper combined with space time coded transmit diversity for frequency selected fading channel.
将自适应比特功率分配技术与空间分集技术结合起来,提出了一种与空时编码结合的固定速率自适应正交频分复用(OFDM)方案。
2.
Orthogonal Frequency Division Multiplexing(OFDM)is a very attractive technique for high-bit-rate wireless communication in a multi-path fading environment.
OFDM是一项能有效对抗高速无线通信中多径衰落的关键技术,为了进一步提高OFDM系统的误码性能,许多信道编码技术已被应用于OFDM系统中,二元域LDPC码以其近香农限的误码性能和较低的译码复杂度成为研究的热点。
3.
A resource allocation algorithm is proposed to improve the frequency efficiency and computational efficiency of orthogonal frequency division multiplexing(OFDM) systems with low signal-to-noise ratios(SNR).
为了提高OFDM系统在平均信噪比较低条件下的系统性能,提出一种新的资源分配算法。
3)  Orthogonal Frequency Division Multiplexing (OFDM)
OFDM
1.
Orthogonal Frequency Division Multiplexing (OFDM) is a special multi-carrier communication system, which is extremely sensitive and vulnerable to synchronization errors.
OFDM系统是一种特殊的多载波通信系统,它对同步的要求特别高,同步不准确会很大程度地影响系统的性能。
2.
This paper proposes a novel channel estimation method for wireless Orthogonal Frequency Division Multiplexing (OFDM) systems.
该文提出了一种新的信道估计算法,用于无线移动信道下的正交频分复用(OFDM)系统。
3.
Orthogonal Frequency Division Multiplexing (OFDM) technique has been considered as one of the cutting edge techniques in 4G mobile communication because it can combat multipath fading and achieve high data rate.
正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)技术由于具有强大的抗多径衰落能力和较高的数据传输速率,被普遍视为第四代移动通信技术中的核心技术。
4)  orthogonal frequency division multiplexing
OFDM
1.
In our opinion,the simplification of base-band transmission for OFDM(orthogonal frequency division multiplexing) underwater acoustic communication is both desirable and possible.
分析了水声通信中最佳频率的选取,提出了低载波频率条件下,通过频率映射,用一对IFFT/FFT运算直接将待发序列调制到载频上的OFDM水声通信基带传输实现方法,该方法可避免发射机的载频调制、接收机的解调及载波同步,简化了发射接收机结构。
2.
A non-data-aided(NDA) method without the pilot signals is proposed for the residual frequency offset(RFO) in orthogonal frequency division multiplexing(OFDM) systems,by using the rotation property of OFDM signals in time domain and the phase offset in frequency domain.
针对高速正交频分复用(Orthogonal frequency division multiplexing,OFDM)系统,提出了一种新的非数据辅助(Non-data aided,NDA)载波残余频偏(Residual frequency offset,RFO)跟踪方法。
3.
An optimal post-inverse discrete Fourier transform(POST-IDFT) multidimensional beamforming is presented for space-time block coding-orthogonal frequency division multiplexing(STBC-OFDM) systems in stationary random fading channels.
提出了适用于平稳随机的频率选择性衰落信道下的空时分组码-正交频分复用(Space-time block coding-Orthogonal frequency division moltiplexing,STBC-OFDM)系统的后-逆离散傅立叶变换(POST-IDFT)多波束形成技术。
5)  Time Divided Adaptive OFDM
TDA-OFDM
6)  OFDM CDMA
OFDM-CDMA
1.
An OFDM CDMA technique in broadband WLAN is applied to cope with interference and multipath fading and improve it s performace,and the basic approach of OFDM CDMA and A MAC protocol is discussed.
提出了一种在单蜂窝式 B-WLAN中采用 OFDM-CDMA技术来抗干扰与抗多径衰落 ,达到提高系统性能的目的 。
补充资料:21st Century Agenda
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性质:1992年6月3~143日以巴西首都里约热内卢召开的联合国环境与发展大会通过的关于全球、区域和各国范围内实现可持续发展的纲领性文件。它提供了一个从现在起至21世纪的行动蓝图,内容涉及国民经济和社会发展的各个领域。其核是把环境与发展作为一个整体,实现人类的可持续发展。中国政府于1994年3月制定了《中国21世纪议程》,阐明了可持续发展的战略和对策。

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