This document provides updates to IEEE Std 802.16's MIB for the MAC, PHY and asso- ciated management procedures in order to accommodate recent extensions to the standard.

IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems Draft Amendment: Management Information Base Extensions

In-band full-duplex (IBFD) technology can enable unique system capabilities and network architectures by allowing devices to transmit and receive on the same frequency at the same time. While previously considered impossible, this ability can now be used to optimize resource sharing within the crowded frequency spectrum for various communication systems, including 5G new radio. The potential of these IBFD systems can only be realized if each device incorporates a sufficient number of self-interference cancellation techniques to ensure that its receivers do not saturate. This tutorial survey offers the most comprehensive collection to date of these techniques and discusses how all of them can be implemented within the different domains of a typical transceiver. In addition, the results of a novel IBFD system study are presented for more than 50 demonstrated communication systems with more than 80 different measurement scenarios. The various system parameters are then combined into a new figure of merit, which can be used to propel future research and accelerate the inclusion of IBFD technology within an upcoming wireless standard.

In-Band Full-Duplex Technology: Techniques and Systems Survey

Fast and reliable time and frequency synchronization is crucial for packet-based orthogonal frequency division multiplex (OFDM) systems. In this paper we compare and analyze preambles for OFDM systems based on repeated OFDM data symbols or repeated short pseudonoise sequences (PN-sequences). We make an analytical evaluation for AWGN channels and simulate the performance in oneand two-tap Rayleigh fading channels. The PN-based preamble gives better detection properties in terms of lower false detection probability and lower probability of missing the synchronization signal. The PN-based preamble has low peak-to-average power ratio and it makes it possible to use an ADC with one-bit quantization in stand-by mode. For frequency offset estimation both preambles give similar performance, but the PN-based preamble allows for a greater reduction in stand-by mode power consumption.

Time and Frequency Synchronization for BRAN using PN-sequence Preambles

A block-request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server (HTTP, FTP, or the like), wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server, which might or might not include a cache. A client device can be adapted to take advantage of the ingestion process as well as including improvements that make for a better presentation independent of the ingestion process. In the block-request streaming system, the an ingestion system generates data according to erasure codes and the client device, through various selection and timing of requests for media data and redundant data, can efficiently decode media to provide for presentations.

Enhanced block-request streaming using cooperative parallel HTTP and forward error correction

The embodiments described herein methods and devices that enhance the endurance of a non-volatile memory (e.g., flash memory). The method includes obtaining, for each of the plurality of die, an endurance metric. The method also includes sorting the plurality of die into a plurality of die groups based on their corresponding endurance metrics, where each die group includes one or more die and each die group is associated with a range of endurance metrics. In response to a write command specifying a set of write data, the method further includes writing the write data to the non-volatile memory by writing in parallel subsets of the write data to the one or more die assigned to a single die group of the plurality of die groups.

Device and method for managing die groups

In this paper, we evaluate the performance of multi-antenna techniques adopted for the IEEE 802.16m standard. Base station is equipped with 4 or 8 antennas, and each mobile station (MS) has 2, 4, 8 antennas. The number of MSs is 4, and MIMO modes 0, 1, and 4 are evaluated. For each mimo mode, various number of data streams can be implemented, and the selected number of streams in the paper corresponds to the parameters adopted for hardware implementation. The error performance of various mimo modes presented in this paper was used as reference performance to verify successful hardware implementation.

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Performance Evaluation of IEEE 802.16m MIMO Modes

In This Paper, we introduce an efficient IFFT design technique named for transmitter of OFDM (Orthogonal Frequency Division Multiplexing) system. In OFDM system, a cyclic prefix is inserted in forepart of OFDM symbol to prevent ICI(Inter-channel Interference) and ISI (Inter-symbol Interference). Attaching cyclic prefix causes delay in storing and copying IFFT result. The proposed IFFT removes this delay because its output is cyclic shifted by the length of cyclic prefix. So we can make a complete OFDM symbol by just copying the forepart of IFFT output to the end. In many cases, the length of cyclic prefix is 1/2n of FFT size, and this IFFT does not require additional hardware complexity and it does not cause any performance degradation.

A Design of IFFT Processor for Reducing OFDM Transmitter Latency

CA/sup 3/TS is a CDMA adaptive antenna array testbed system for the reverse-link of a IS 95-like DS-CDMA system, which has been operated successfully in a field test. In this paper, the minimum mean-square error (MMSE) type of two-dimensional (2-D) RAKE receiver is proposed, and its performance is analyzed under the environment of macro and micro cells.

MMSE 2-D RAKE receiver in CA/sup 3/TS

A method for calculating frequency offset using arc tangent calculations according to real part and imaginary part input values received externally. The method includes converting arc tangent equations for determining frequency offset into equations to perform log calculations; calculating frequency offset using linear approximation and the converted log equations; and dividing the real part input value to bit values of a predetermined size to realize a size similar to that of the imaginary part input value if a range of the frequency offset value to be calculated is small. With the use of the method, hardware area and power consumption may be reduced, and precise frequency offset may be calculated.

Frequency offset calculation method using log transforms and linear approximation

Unlike in the IS-95 based synchronous CDMA system, each base station (BS) operates asynchronously and use Gold code sequence in the 3GPP asynchronous WCDMA system. Therefore, for soft handover (SHO) case, the searching time for all active set members of BS becomes very long. In order to maintain good link quality during the handover execution, it is very important to reduce the handover search time for the target BS. In this paper, we propose an efficient searcher architecture and algorithm to reduce handover search time for asynchronous WCDMA system. We introduce double dwell serial searcher architecture with dual scrambling code generators and search algorithm, which reduce search time in handover environment with small increase of hardware complexity. Average search time performance of proposed scheme is analyzed for soft handover environment. And the real threshold values of search mode and verification mode are investigated. The results analyzed in this paper may be applied to the designing of the user equipment (UE) multi-path searcher of 3GPP WCDMA system.

Youn-Ok Park

Papers

Performance Evaluation of IEEE 802.16m MIMO Modes

A Design of IFFT Processor for Reducing OFDM Transmitter Latency

MMSE 2-D RAKE receiver in CA/sup 3/TS

Frequency offset calculation method using log transforms and linear approximation

A design of high speed multi-path searcher using dual scrambling code generators for WCDMA