domain equalization
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Time-Domain and Frequency-Domain Per-Tone Equalization for OFDM Over Doubly Selective Channels
White Paper This paper proposes new time- and frequency-domain per-tone equalization techniques for orthogonal frequency division multiplexing (OFDM) transmission over time- and frequency-selective channels. It also presents one mixed time- and frequency... [03 Jul 2008]
Improved Initialization for Time Domain Equalization in ADSL
White Paper An improved optimization algorithm for the time domain equalizer (TEQ) is developed for discrete multitone (DMT) based asymmetric digital subscriber line (ADSL). In contrast with existing algorithms, the algorithm presented in this paper explicitly... [03 Jul 2008]
Autocorrelation - A New Differentiating Domain For Multiple Access Wireless Communications
White Paper The advantages of having autocorrelation as the differentiation factor for multiple access communications systems include, among others, one FIR vector filter automatically does both the equalization of the designated FIR channel for the purpose... [03 Jul 2008]
Towards a New Transform Domain Adaptive Filtering Process Using Differential Operators
White Paper Finally, we present some empirical results in adaptive filtering obtained through the use of chromatic derivatives as applied to the problem of channel equalization by performing a computer simulation. [03 Jul 2008]
Frequency-Domain Equalization for OFDM Over Doubly-Selective Channels
White Paper This paper proposes a new equalization technique for multi-carrier systems over time- and frequency-selective channels. However, it is shown that by transferring the time-domain operations to the frequency-domain, we can approach the performance of... [10 Apr 2008]
A Dual-Path TEQ Structure for DMT-ADSL Systems
White Paper DMT modulation allows for simplified equalization when the effective duration of the channel memory is shorter that the predefined length of the cyclic prefix (CP). A single time-domain equalizer (TEQ) is typically used to truncate the channel... [10 Apr 2008]
Time-Domain and Frequency-Domain Per-Tone Equalization for OFDM Over Doubly-Selective Channel
White Paper This paper proposes new time-domain and per-tone frequency-domain equalization techniques for OFDM transmission over time- and frequency-selective channels. This paper presents one mixed time- and frequency-domain equalizer and one per-tone... [19 Apr 2007]
Channel Modeling and Associated Inter-Carrier Interference Equalization for OFDM Systems With High Doppler Spread
White Paper On the other hand it shows that, considering a whole CP-OFDM symbol, this leads to a duality between equalization of the delay spread of a time-varying channel in time domain, and the equalization of the Doppler spread of a frequency selective... [18 Apr 2007]
Per-Tone Equalization for MIMO-OFDM Systems
White Paper This so-called PerTone EQualization (PTEQ) approach for MIMO OFDM systems is an attractive alternative for the recently developed Time-domain EQualization (TEQ) approach for MIMO OFDM systems. As a result, the existing equalization approach for... [18 Apr 2007]
Frequency Domain Equalization of DMT/OFDM Systems With Insufficient Guard Interval
White Paper This paper proposes a new, generalized approach for equalization of Discrete Multi-Tone (DMT) systems, which not only uses redundancy in the time domain by adding a guard interval, but also takes advantage of existing or intentionally placed... [14 Apr 2007]
Time-Domain and Frequency-Domain Per-Tone Equalization for OFDM Over Doubly-Selective Channels
White Paper This paper proposes new time-domain and per-tone frequency-domain equalization techniques for OFDM transmission over time- and frequency-selective channels. The paper presents one mixed time- and frequency-domain equalizer and one per-tone... [14 Apr 2007]
Low-Complexity Time-Domain ICI Equalization for OFDM Communications Over Rapidly Varying Channels
White Paper In contrast to existing frequency-domain approaches, the schemes operate in the time domain. This paper considers wireless OFDM communications over rapidly varying channels as occurring e.g.in high-mobility scenarios. [11 Apr 2007]
Space-Time Interference Cancellation in MIMO-OFDM Systems
White Paper The first stage uses time domain equalization to suppress co-channel interference, mitigate asynchronism, and shorten the post-equalization channel response to be no longer than the length of the cyclic prefix. [11 Apr 2007]
A Comparision of OFDM and Non-Linear SC/FDE Signals: Non-Linear Amplification
White Paper In contrast to OFDM (Orthogonal Frequency Division Multiplexing), SC/FDE (single carrier transmission with frequency domain equalization) allows to apply signal formats with constant envelope, such as CPM (Continuous Phase Modulations) or at least... [11 Apr 2007]
Joint Time-Domain Tracking of Channel and Frequency Offset for OFDM Systems
White Paper The channel taps and the frequency offset are estimated in time-domain while equalization is performed in frequency domain. This paper addresses the problem of joint channel and frequency offset estimation and tracking for OFDM systems. [11 Apr 2007]
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