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Feature
² M2M, IoT
² Wireless Alarm and Security Systems
² Wireless water/heat/gas meter reading system
² Wireless sensor
² Intelligent instrument and meter
² Intelligent lighting control
² Auto data collection
² Remote control and sensing
² Smart building and security
² Power system monitoring
² Wireless warehousing, logistics management
² LoRaTM modulation technology
² Orthogonal spreading factors
² Sensitivity down to -142 dBm
² SX1301 base band processor
² Up to 196 LoRa demodulators
² Globally unique 64-bit identifier
² Four band and 32 frequency support
² Transmission distance > 5000 m
² Frequency 862 MHz to 1020MHz
² Maximum transmission power 23dBm
LoRa Modulation Technique
The WxS 8GWI uses Semtech’s LoRa proprietary spread spectrum modulation technique. This modulation, in contrast to conventional modulation techniques, permits an increase in link budget and increased immunity to in-band interference. LoRa also provides significant advantages in both blocking and selectivity, solving the traditional design compromise between range, interference immunity and energy consumption.
In LoRa mode the WxS 8GWI offers 125 kHz bandwith with spreading factors ranging from 7 to 12. The spread spectrum LoRa modulation is performed by representing each bit of payload information by multiple chips of information. The rate at which the spread information is sent is referred to as the symbol rate (Rs), the ratio between the nominal symbol rate and chip rate is the spreading factor and represents the number of symbols sent per bit of information. The range of parameters which can be configured are given in the following tables.
Spreading Factor
Chips/Symbol
SNR/[dB]
7
128
-7.5
8
256
-10
9
512
-12.5
10
1024
-15
11
2048
-17.5
12
4096
-20
WxS 8GWI based with processor SX1301 which can receive 8 packet with different frequency and Rs per SX1301. WxS 8GWI surpport up to 4 SX1301, So it can receive 32 packets at the same time with different frequency and Rs.Global Electrical Characteristics