This application report describes a wide-band modulation scheme to comply with the requirements of FCC section 15.247 for non-frequency hopping digital modulation systems utlizing datarates below 500kbps. The scheme is implemented with an MCE patch, which is a standalone program that implements the various options of the Wide-Band Direct Sequence Spread Spectrum (WB-DSSS) scheme. The patch is included in the CC1310 SDK and can be setup to be imported in the final application by Code Export option of SmartRF™ studio. This SDK can be downloaded from: http://www.ti.com/tool/SIMPLELINK-CC13X0-SDK.
The implementations and summary of performances measured on CC13x0EM [5] are provided in this document.
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WB-DSSS uses a well-known method to obtain sensitivity gains by means of coding and spreading the information bits into a series of transmitted symbols.
The transmit spectrum requirements of FCC Section 15.247 for digital transmission systems operating in the 902 MHz - 928 MHz band are as follows:
Acronym | Description |
---|---|
(G)FSK | (Gaussian) Frequency shift keying |
AWGN | Additive White Gaussian Noise |
SNR | Signal to Noise Ratio |
BW | Bandwidth |
DSSS | Direct Sequence Spread Spectrum |
PER | Packet Error Rate |
BER | Bit Error Rate |
CRC | Cyclic Redundancy Check |
FEC | Forward Error Correction |
MCE | Modem Control Engine |
XOR | Exclusive OR |