NR FDD and LTE FDD are two different technologies used for 5G and 4G mobile networks, respectively. They both use frequency division duplex (FDD) as a spectrum usage technique, which means that they use different frequency bands for uplink and downlink transmissions. However, there are some key differences between them, such as:
• NR FDD is the 5G new radio (NR) standard that supports both sub-6 GHz and mmWave frequency bands, while LTE FDD is the 4G long-term evolution (LTE) standard that only supports sub-6 GHz frequency bands.
• NR FDD has more flexible channel bandwidths than LTE FDD, ranging from 5 MHz to 100 MHz for sub-6 GHz bands and from 50 MHz to 400 MHz for mmWave bands. LTE FDD has fixed channel bandwidths of 1.4, 3, 5, 10, 15, or 20 MHz for sub-6 GHz bands.
• NR FDD uses a more advanced modulation scheme than LTE FDD, which is quadrature amplitude modulation (QAM) with up to 256 states. LTE FDD uses QAM with up to 64 states. This means that NR FDD can achieve higher data rates and spectral efficiency than LTE FDD.
• NR FDD supports more advanced features than LTE FDD, such as massive multiple-input multiple-output (MIMO), beamforming, network slicing, and ultra-reliable low-latency communication (URLLC). These features enable NR FDD to provide better performance, reliability, and flexibility than LTE FDD.
