A time-interleaved ADC system is an effective way to implement a high-sampling-rate ADC with relatively slow circuits. In the system, several channel ADCs operate at interleaved sampling times as if they were effectively a single ADC operating at a much higher sampling rate. Mismatches among channel ADCs degrade SNR and SFDR of the ADC system as a whole, and the effects of offset, gain and band...

This paper aims to The mobile WiMAX air interface adopts orthogonal frequency division multiple access (OFDMA) as multiple access technique for its uplink (UL) and downlink (DL) to improve the multipath performance. All OFDMA based networks, including mobile WiMAX experiences the problem of high peakto-average power ratio (PAPR). This thesis presents: Discrete-Cosine transform matrix (DCTM) pre...

In this paper, we design bit-interleaved coded modulations for multiple antenna channels under iterative detection and decoding. Binary QAM mappings and linear space-time precoders are fine tuned by the mean of a genie method that assumes perfect a priori information. We also describe the construction of an interleaver that optimizes the total spacetime diversity order for a given error-correct...

In the accompanying paper a method for blind (i.e., no calibration needed) estimation and compensation of the time errors in a time interleaved ADC system was presented. In this paper we evaluate this method. The Cramer-Rao bound is calculated, both for additive noise and random clock jitter. Monte-Carlo simulations have also been done to compare to the CRB. Finally, the estimation method is va...

Interleaved convolutional time hopping (ICTH) is a recently proposed coding/modulation scheme for UWB impulse radio. ICTH is based upon a low-rate convolutional code, with optimized distance properties, combined with multilevel pulseposition modulation (PPM). In this context, bit-interleaved coded modulation (BICM) is used to decorrelate the bit errors and, more importantly, to obtain a flat sp...

Interleaving the chip-level sequence resulting from spreading before transmission in direct spread code division multiple access (DS-CDMA) systems have been reported to allow significant improvements over conventional (non chipinterleaved) DS-CDMA. This transmission scheme has been shown to be of particular interest when used in conjunction with iterative receivers, allowing performance close t...

Time interleaving of multiple analog-todigital converters by multiplexing the outputs of (for example) a pair of converters at a doubled sampling rate is by now a mature concept—first introduced by Black and Hodges in 1980. Time interleaving of ADCs offers a conceptually simple method for multiplying the sample rate of existing high-performing ADCs. Time-interleaved analog-to-digital converters...

Primitive processes involved in auditory stream formation are measured with indirect, objective method. A target melody interleaved with a distractor sequence is followed by a probe melody that was identical to the target or differed by 2 notes. Listeners decided whether the probe melody was present or not in the composite sequence. Interleaved melody recognition is not possible when distractor...

In this paper, the performance of Discrete Fourier Transform (DFT) precoded Orthogonal Frequency Division Multiple Access (OFDMA) schemes with interleaved and with blockwise subcarrier allocation is investigated and compared. Transmission with one transmit antenna is compared to transmission with multiple transmit antennas using Cyclic Delay Diversity (CDD). It is shown that the investigated DF...

Coded modulation is a bandwidth efficient schemes that combines the function of coding and modulation. In this paper a comparative study of various modulation techniques such as Trellis coded modulation(TCM),Turbo Trellis coded modulation(TTCM),Bit-Interleaved Coded Modulation(BICM) ,Iterative Decoding Bit-Interleaved Coded Modulation(BICM-ID) and Superposistion Coded Modulation schemes over Ga...