IIIE   20352
INSTITUTO DE INVESTIGACIONES EN INGENIERIA ELECTRICA "ALFREDO DESAGES"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Interference Analysis in the LTE and NB-IoT Uplink Multiple Access with RF impairments
Autor/es:
GUSTAVO J. GONZÁLEZ; FERNANDO H. GREGORIO; GUSTAVO J. GONZÁLEZ; FERNANDO H. GREGORIO; JUAN E. COUSSEAU; JUAN E. COUSSEAU
Lugar:
Shanghai
Reunión:
Conferencia; 2018 IEEE 23rd International Conference on Digital Signal Processing (DSP); 2018
Institución organizadora:
IEEE
Resumen:
Narrowband internet of things (NB-IoT) considers the connection of thousands of devices to a single LTE base station (BS). To make possible the coexistence with classic LTE user equipements (UE)s, the BS allocates several IoT UEs into special physical resource blocks (PRB)s. These special PRBs reduce the IoT transmitter complexity but make the LTE signal interfere with the IoT PRBs. IoT nodes are in general low-cost and therefore prone to suffer from RF impairments. The LTE interference and the RF impairments compromise the performance of IoT nodes. In this paper, we analyze the coexistence of LTE and IoT in the multiple access uplink, considering RF impairments. We analyze the use of guard bands to reduce the interference from LTE in IoT. Also, we evaluate the allowable carrier frequency offset (CFO) and I/Q imbalance levels that ensures a reasonable system performance.