WIND FLEX Summit 02 AAMv2

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Slide1: WIND-FLEX A flexible high bit rate modem architecture for next generation short-range wireless networking

WIND-FLEX: A joint European-wide effort: WIND-FLEX: A joint European-wide effort Industry PHILIPS INTRACOM ACORDE Research Centers VTT CEFRIEL Universities University of Cantabria Technical University of Dresden University of Rome University of Athens Poznan University of Technology ~20 persons per year Jan2000-Jun2003 10 partners

WIND-FLEX objectives: WIND-FLEX objectives Definition of a 17 GHz radio system architecture for broadband (64 kbps - 100Mbps) indoor (office/home) applications scope encompassing radio interface specifications (i.e. Physical, Baseband, MAC/DLC layers) Definition of a flexible radio interface architecture flexible control algorithms and real time reconfigurable baseband and MAC/DLC schemes allow adaptive optimization of radio interfaces WIND FLEX

WIND-FLEX main characteristics: 17GHz RF OFDM-based Very high bit rate Adaptive WIND-FLEX main characteristics

WIND-FLEX throughput : WIND-FLEX throughput

WIND-FLEX cluster: WIND-FLEX cluster The Master coordinates the medium access in the cluster, granting an efficient sharing of the radio channel The Slave when associated to the cluster, can establish a direct connection to exchange data traffic with any other device No hardware or software differences among the devices Full-meshed Network Master Slave C E D B A The Master election protocol is periodically repeated with period D, with D small enough to take into account the mobility of the devices (also repeated whenever the network topology changes significantly)

Flexibility/Adaptability/Reconfigurability (FAR): Flexibility/Adaptability/Reconfigurability (FAR) Flexibility is defined as an “umbrella” concept, encompassing multiple “orthogonal” features: Flexibility = adaptivity + reconfigurability +modularity+… A system is called adaptive if it can respond to changes by properly altering the numerical value of a set of parameters. It is reconfigurable if it can be rearranged, at a “structural” or “architectural” level. Notes: for adaptivity, numerical change is meant to be gradual “architectural” implies change of heterogeneous elements, such as in sw/hw partitioning; “structural” is a change of homogeneous elements, such as going from a turbo to a convolutional code

FAR Supervisor: FAR Supervisor “Fitting QoS requirements from the MAC layer, given current channel conditions and traffic load, with the minimum transmitted/processing power” Turbo Enc OFDM Mod Turbo Dec LNA MAC HPA Channel condition signalling “SUPERVISOR” OFDM Demod IFFT size TC code rate IFFT size WSCE positions constellation TX power

BB FAR features: BB FAR features Adaptivity at the physical layer Keep the slot (symbol) and frame length fixed, and vary TC code rate OFDM constellation size (same for all subcarriers) Weak Subcarrier Excision (WSCE) Minimum TX power required Minimize processing power Reconfigurability at the physical layer Minimize processing power Parametric FFT length (N) and clock frequency as a function of QoS Change from Turbo coding to Convolutional coding or with no coding as a function of QoS

Channel model creation process: Channel model creation process Typical office/home scenario Materials: brick, glass, soft internal walls, wooden surfaces From simulations, PDP with 3 ns resolution were adjusted into a bins model Bin size chosen half of the transmitted pulse duration and place in the temporal axis: Ti = TPROP + (i-½)*TBIN i = 1,2,…,NBINS Free space losses have been subtracted

IF Section: IF Section

RF Section: RF Section Output Frequency: 17.1-17.3 GHz Low Noise Figure: 2.9 dB Low phase noise Design of special mechanical boxes, for high gain MMIC devices Own power supply, whole power consumption lower than 5 W Two antenna models: Single patch, 3 dB Gain, directional Six-faced structure, three patches per face, 3dB Gain, omnidirectional

WIND-FLEX concept: WIND-FLEX concept

Slide15: Weaknesses (?) Cost of 17GHz RF front-end interface Global approval of 17GHz frequency Strengths Time advantage! Backward compatible and promising concept for the future No harmful interference to other wireless systems Threats UWB (Ultra wideband) competing technology

Slide16: WIND-FLEX is a big opportunity for Semiconductor and Component companies to lead and shape Next Generation Networking ICs and modules market Next steps … Demonstrate complete system, make extensive tests and refine specifications Get a business ownership and make it a standard

Slide17: WIND-FLEX A flexible high bit rate modem architecture for next generation short-range wireless networking Ilkka Saarinen, WIND-FLEX Project Manager, Ilkka.Saarinen@vtt.fi Aarne Mämmelä, Research Professor, VTT Electronics, Finland, Aarne.Mammela@vtt.fi Contacts: More information: http://www.vtt.fi/ele/research/els/projects/windflex.htm