Communication systems operating in the 60 GHz ISM band: Overview

This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.This paper gives an overview of frequency regulation, standardization, and applications of 60 GHz communication systems. Based on forecasted developments of mobile IP traffic, the motivation for investigating circuits, and systems for the 60 GHz band is underlined. Some physical properties of 60 GHz radio waves are outlined and implications on potential applications are sketched. The current international and European frequency regulation aspects are presented. The main parameters of three different international standards are summarized and compared with each other. Details of channel spacing and channel bonding are given. Based on the investigation of different applications, the main system requirements are derived. Finally, some information on protocol issues and system integration aspects are given.Peer Reviewe

MAC and baseband processors for RF-MIMO WLAN

The article describes hardware solutions for the IEEE 802.11 medium access control (MAC) layer and IEEE 802.11a digital baseband in an RF-MIMO WLAN transceiver that performs the signal combining in the analogue domain. Architecture and implementation details of the MAC processor including a hardware accelerator and a 16-bit MACphysical layer (PHY) interface are presented. The proposed hardware solution is tested and verified using a PHY link emulator. Architecture, design, implementation, and test of a reconfigurable digital baseband processor are described too. Description includes the baseband algorithms (the main blocks being MIMO channel estimation and Tx-Rx analogue beamforming), their FPGA-based implementation, baseband printed-circuit-board, and real-time test

Digital DC blocker filters

This paper mathematically investigates a special kind of digital infinite-impulse response (IIR) filters, suitable for filtering out very low frequencies near zero from digital signals. We investigate the transfer functions of such filters from 1st to 3rd order and provide formulas to calculate the filter coefficients from the desired cutoff frequency

Präzise Lokalisierung und Breitband-Kommunikation im 60-GHz-Band - PreLocate, Teilvorhaben: HF-Chips und Basisbandverarbeitung für Lokalisierung und Kommunikation im 60- GHz-Band (PreLocate-IHP) : Schlussbericht ; Projektlaufzeit: 01.10.2011 bis 31.07.2014

Für zahlreiche Anwendungen im Bereich mobile drahtlose Kommunikation besteht der Bedarf nach einer genauen Lokalisierung mobiler Terminals. Dabei ist oft eine zentimetergenaue Lokalisierung bei gleichzeitiger Datenübertagung mit Raten von > 1 Gb/s notwendig. Auf Grund der hohen verfügbaren Bandbreite eignen sich dafür Funksysteme im mm-Wellen Bereich und insbesondere im 60-GHz-Band hervorragend. Am IHP wurde ein HF-Chip-Satz für 60 GHz Übertragung mit Beamsteering-Funktionalität entwickelt. Des Weiteren wurde ein OFDM Basisband-Prozessor für Übertragungsraten bis zu 3,6 Gb/s entwickelt. Dieser wurde mit einem Verfahren zur Entfernungsmessung erweitert. Die Steuerung von Datenübertragung und Entfernungsmessung erfolgt über einen speziellen MAC Prozessor. Beide Funktionen laufen im zeitmultiplex quasi-gleichzeitig ab. Zum Nachweis der Funktionalität der gleichzeitigen Datenübertragung und Lokalisierung wurde ein FPGA-basierter Demonstrator entwickelt und mehrfach ausgestellt.For many applications using mobile wireless communications, precise localization of mobile terminals is required or advantageous. Often the precision of localization has to be in the cm-range and data rates are required to exceed 1 Gb/s. Due to the large available bandwidth, mmWave radio systems operating in the 60 GHz band are particularly well suited. At IHP a RF-chip set for data transmission with beamsteering functionality was developed. Furthermore, an OFDM baseband processor for data rates up to 3.6 Gbit/s was developed. This baseband processor was extended with a function for round-trip time-of-flight (RTToF) based ranging. The control of data transmission and ranging is done by a special MAC Processor. Both functions are performed in time-multiplex quasi-simultaneously. To show and verify the simultaneous data transmission and ranging functionality, an FPGA-based demonstrator was developed. This demonstrator was successfully presented at several events

60-GHz-Multimode-Chip-Satz und Demonstrator (EASY-A/IHP) : Schlussbericht

[no abstract available

MAC and baseband processors for RF-MIMO WLAN

The article describes hardware solutions for the IEEE 802.11 medium access control (MAC) layer and IEEE 802.11a digital baseband in an RF-MIMO WLAN transceiver that performs the signal combining in the analogue domain. Architecture and implementation details of the MAC processor including a hardware accelerator and a 16-bit MAC-physical layer (PHY) interface are presented. The proposed hardware solution is tested and verified using a PHY link emulator. Architecture, design, implementation, and test of a reconfigurable digital baseband processor are described too. Description includes the baseband algorithms (the main blocks being MIMO channel estimation and Tx-Rx analogue beamforming), their FPGA-based implementation, baseband printed-circuit-board, and real-time tests

MIMO Transmission in IEEE802.11 WLAN Systems

The present invention allows an IEEE802.11 receiver to operate on two alternative physical layers. The first of the two alternative physical layers is the conventional IEEE802.11 physical layer according to a respective specific standard, which is well known in the art and provides communication between a transmitter and a receiver via a SISO OFDM transmission. A second, alternative physical layer that, among other advantages, enables a higher reliability than the conventional IEEE802.11 physical layer, is provided by operating the IEEE802.11 receiver to process a specific type of MIMO transmissions, which as such are foreign to the IEEE802.11 WLAN standards. A MIMO transmission according to the present invention has multiple concurrent transmissions of a single stream of analogue RF data signals, wherein corresponding analogue RF data signals of different ones of the concurrent transmissions of the stream differ only by having different amplitudes or different phases, or both, different amplitudes and phases.Solicitud: 09156126.6 (25.03.2009)Nº Pub. de Solicitud: EP2234355A1 (29.09.2010)Nº de Patente: EP2234355B1 (31.10.2012

A 112 Gb/s radiation-hard mid-board optical transceiver in 130 nm SiGe BiCMOS for intra-satellite links

We report the design of 112 Gb/s radiation-hard (RH) optical transceiver applicable to intra-satellite optical interconnects. The transceiver chipset comprises of VCSEL driver and transimpedance amplifier (TIA) ICs integrated with four channels per die, which are adapted for flip-chip assembly into a mid-board optics (MBO) optical transceiver module. The ICs are designed in the IHP 130nm SiGe BiCMOS process (SG13RH) leveraging proven robustness in radiation environments and high-speed performance featuring bipolar transistors (HBTs) with fT/ fMAX values of up to 250/340 GHz. Besides hardening-by-technology, radiation-hardened-by-design (RHBD) components are used, including enclosed layout transistors (ELT) and digital logic cells. We report design features of the ICs and module and provide performance data from post-layout simulations. We present radiation evaluation data on the analogue devices and digital cells, which indicate that the transceiver ICs would operate under typical total ionizing dose (TID) levels and single event latch-up thresholds found in geostationary satellites