LRP vs HRP | Difference between UWB LRP PHY and HRP PHY mode
This page compares UWB LRP PHY vs HRP PHY and mentions difference between UWB LRP PHY and HRP PHY mode.
Introduction: UWB (Ultra Wideband) supports higher data rates, low power consumption and multiple access. It offers efficient short range communication. Hence it is used in various applications such as smart homes, smart offices, radar imaging, medical services and tracking. UWB uses 3.1 GHz to 10.6 GHz frequency for communication. UWB transmitter uses short pulses which provides larger bandwidth.
There are various IEEE 802.15.4 standards which define specifications of PHY layer and MAC layer which include 802.15.4a-2007, 802.15.4-2011, 802.15.4f-2012, 802.15.4-2015 and IEEE 802.15.4z-2020. Following table mentions comparison between two PHY versions of UWB i.e. LRP and HRP. Physical layer defines modulation schemes, data rates, number of channels, encoding, interleaving etc. HRP stands for High Rate Pulse Repetition Frequency and LRP stands for low rate pulse repetition frequency.
| Parameters | UWB LRP PHY | UWB HRP PHY |
|---|---|---|
| Standards | IEEE 802.15.4/802.15.4z | IEEE 802.15.4/802.15.4z |
| Data Rates | 31.25 kbps, 250 kbps, 1 Mbps (IEEE 802.15.4) 2/3/4/5/6/8/10 Mbps (IEEE 802.15.4z) |
110 kbps, 850 kbps, 6.81 Mbps, 27.24 Mbps (IEEE 802.15.4) |
| Peak Pulse Repetition Rate | 2 MHz (IEEE 802.15.4) 4 MHz (IEEE 802.15.4z) |
499.2 MHz |
| Ranging support | Not supported in IEEE 802.15.4 Added this feature in IEEE 802.15.4z |
Supported in IEEE 802.15.4 |
| Multi-user interference suppression | Not supported in IEEE 802.15.4 | Supported in IEEE 802.15.4 |
| Modulation | OOK, PPM (IEEE 802.15.4) PBFSK, BPFSK + 8/16/32 PPM (IEEE 802.15.4z) |
BPSK + BPM (IEEE 802.15.4) BPSK (IEEE 802.15.4z) |
| Error Correction | SECDED Convolutional (IEEE 802.15.4) | SECDED Convolutional (K=3) Reed-Solomon (in IEEE 802.15.4) Convolutional (K=7) (in IEEE 802.15.4z) |