Patent application number | Description | Published |
20090147749 | COMBINED FREQUENCY-TIME DOMAIN POWER ADAPTATION FOR CDMA COMMUNICATION SYSTEMS - Practical transmission power adaptation in multicarrier code division multiple access (MC-CDMA) communications is using either a frequency domain technique or a time domain technique or a combined frequency and time domain technique in response to channel variations. With frequency domain power adaptation, the transmission power is allocated over the N′ (1≦N′≦N) strongest subcarriers rather than over all possible N subcarriers, where the strongest subcarriers are understood to exhibit the highest channel gains. A substantially optimal N′ can be chosen so that the average bit error rate (BER) is minimized. In the time domain power adaptation technique, transmission power is adapted so that the desired signal strength at the receiver output is maintained at a fixed level. In the combined time and frequency domain adaptation technique, the transmission power is first allocated over the N′ (1≦N′≦N) strongest subcarriers rather than over all possible N subcarriers and then it is adapted so that the desired signal strength at the receiver output is maintained at a fixed level. | 06-11-2009 |
20090180572 | Apparatus and method for space frequency block coding in a multiple input multiple output single carrier wireless communication system - A Multiple Input Multiple Output (MIMO) single carrier wireless communication system is provided. The system includes a coder for performing block coding on symbols, an extender for collecting the block-coded symbols during one transmit (Tx) signal duration and for performing repetitive extension on the collected symbol vectors by an interval required in a frequency domain, an inserter for inserting ‘0’ to the repetitively extended symbol vectors so that the vectors are mutually orthogonal in a time domain, and a combiner for multiplying the ‘0’-inserted symbol vectors by a phase component so that the vectors are mutually orthogonal in the frequency domain and thereafter for combining the symbol vectors to generate a Tx signal for each antenna. | 07-16-2009 |
20100195703 | Decoding of Orthogonal Space Time Codes - Implementations of improved OSTC decoding are disclosed where received channel output corresponding to a partial OSTC codeword may be used to generate estimated channel output, and where the received channel output and the estimated channel output may be used to reconstruct the OSTC codeword. | 08-05-2010 |
20100195750 | Transmission of Orthogonal Space Time Codes - Implementations of improved transmission of orthogonal space time codes are disclosed. | 08-05-2010 |
20100254311 | Pulse-Coupled Discrete-Time Phase Locked Loops For Wireless Networks - A model of a pulse-coupled discrete-time phase locked loops (PLLs) in a wireless network is provided. The PLLs at each node in the network may have an indeterminate order. A method for securing discrete-time distributed phase locked loops (PLLs) in a wireless network by including an outlier detection scheme in the timing update at each node is also provided. The method may include evaluating each collaborating node based on a weighted average of the clock errors and evaluating the dispersion of clock errors. | 10-07-2010 |
20100272160 | Decoding Data Transmitted Using Space-Time Spreading in a Wireless Communication System - Examples are disclosed for determining a bit error rate (BER) associated with decoding data transmitted using space-time spreading (STS) in a wireless communication system. | 10-28-2010 |
20100316091 | Transmitting and Receiving Schemes for Multiuser Single-Carrier Space Time Spreading with Frequency Domain Equalization - Examples are disclosed for transmitting and receiving schemes for multiuser single-carrier space time spreading (STS) with frequency domain equalization. | 12-16-2010 |
20130003784 | TRANSMITTING AND RECEIVING SCHEMES FOR MULTIUSER SINGLE-CARRIER SPACE TIME SPREADING WITH FREQUENCY DOMAIN EQUALIZATION - Examples are disclosed for transmitting and receiving schemes for multiuser single-carrier space time spreading (STS) with frequency domain equalization. | 01-03-2013 |