Nanotron Localization module

nanoLOC AVR Module

Small Form RF Module Integrating nanoLOC TRX Transceiver and ATmel AVR Microcontroller
This smart nanoLOC AVR Module is only 35 mm by 14 mm and less than 3 mm thick. Yet, within this small form factor it integrates all the required components for a complete RF module based on Nanotron’s innovative nanoLOC TRX Transceiver. This module uses the Atmel AVR ATmega644 microcontroller and includes a band pass filter, a balun, and an integrated 2.4 GHz chip antenna.

Due to the chip’s unique chirp pulse, adjustment of the antenna is not critical. This significantly simplifies the system’s installation and maintenance (“pick and place”). A sophisticated MAC controller with CSMA/CA and TDMA support is included, as is Forward Error Correction (FEC) and 128 bit hardware encryption. To minimize software and microcontroller requirements, nanoLOC also provides scrambling, automatic address matching, and packet retransmission.

Typical Applications

The following sample applications are typical of some of the uses of the nanoLOC AVR Module.

Applications
RTLS and Ranging	nanoLOC Location Application Using the ranging capabilities of the nanoLOC chip and a location algorithm in software, the X/Y coordinates of a tag can be calculated in 2D space. An embedded application provides the ranging data, while a Windows®-based application determines the tag location. nanoLOC Ranging Application Using the ranging capabilities of the nanoLOC chip and the nanoLOC nTRX Driver, the distance between a tag and a reader can be determined. An embedded application provides ranging data, while a Windows®-based application displays the ranging data results.
Wireless Sensor Networks	nanoLOC Talk Application Using the robust communication capabilities of the nanoLOC chip, this simple chat application demonstrates the use of nanoLOC for point-to-point wireless communication. An embedded application sends and receives chat text while a Windows®-based application displays and provides the chat text.
Cable Replacement	RS-232 Cable Replacement Application With a carrier board, the nanoLOC AVR Module can provide a convenient RS-232 connection where a wired connection could not be established.

Ranging

nanoLOC Ranging uses a methodology called Symmetrical Double-Sided Two-Way Ranging (SDS-TWR) developed by Nanotron Technologies and is part of the nanoLOC nTRX Driver.
Three different ranging modes are available:

• SDS-TWR 3W_A provides measurement results to Peer station A (the local station that requested the ranging)
• SDS-TWR 3W_B provides measurement results to Peer station B (the remote station with which the location station is performing ranging)
• SDS-TWR 2W_PP operates identical to 3W_A except it uses time data from the previous ranging request to reduce energy consumption and quicker generation of ranging results

The SDS-TWR ranging methodology is:

• Symmetrical as the first ranging measurement from Peer A to Peer B is mirrored by a second ranging measurement from Peer B to Peer A
• Double-Sided as the ranging measurement is performed between two peer nanoLOC - enabled devices
• Two-Way as a Data packet and an automatic hardware acknowledgement provide the time values used for determining the ranging measurement

Range	up to 1000m (3280ft)¹
Distance resolution	10 cm
Accuracy	typ. 1-2 m1

¹Communication range and accuracy are quoted for unobstructed line of sight conditions. Actual values are subject to type of terrain, electromagnetic interference, height, and obstructions. These values are often less than the maximum possible.
Specification

Specification

Key IC Specifications
RF IC	nanoLOC TRX Transceiver (NA5TR1)
Modulation technique	Chirp Spread Spectrum
Operates worldwide	2.45 GHz ISM band
Ranging accuracy	2 m indoors / 1 m outdoors
Supply voltage	2.5 V ± 0.2 V
Output power (programmable)	-33 dBm to 0 dBm
Data rates (programmable)	125 kbps to 2 Mbps
Operating temperatures	-40°C to + 85°C
Receiver sensitivity (FEC on)	up to -97 dBm
Current consumption TX	30 mA @ 0 dBm
Current consumption RX	starts at 33 mA
Standby current with active RTC	1.2 µA

Module Specifications
Microcontroller	Atmel AVR ATmega644V
Memory	64 KB Flash, 4 KB RAM, 2 KB EEPROM
Flashing and debugging	SPI and JTAG pads for flashing and debugging
Antenna	Integrated chip antenna, external antenna and PA possible
External Interfaces	36 peripheral module pins in total
Digital IOs	16 programmable digital IOs
Analog inputs	2 analog inputs
Other interfaces	Pulse-width modulation (PWM) output
	Timer/counter input
	Universal synchronous RX/TX (USART) input/output
	Antenna /TX_RX signal to enable external Power Amplifier / Low-noise Amplifier

Question is, how really precise is this module?, because company doesn't publish this data.
for more visit: http://www.nanotron.com/EN/PR_nL_AVR_module.php

The precision of nanoLoc:
http://202.194.20.8/proc/VTC09Spring/DATA/01-05-05.PDF