Efficient cosine modulated filter bank structure for O-QAM system

1995 ◽  
Vol 31 (18) ◽  
pp. 1561-1562
Author(s):  
X.Q. Gao ◽  
Z.Y. He ◽  
H.X. Zhou
Keyword(s):  
Filter Bank ◽  
Bank Structure

scholarly journals Performance Evaluation of Mel and Bark Scale based Features for Text-Independent Speaker Identification

2019 ◽  
Vol 8 (11) ◽  
pp. 3734-3738
Keyword(s):  
Speaker Recognition ◽  
Filter Bank ◽  
Work Performance ◽  
Speaker Identification ◽  
Recognition Rate ◽  
Identification System ◽  
Bank Structure ◽  
Speech Features ◽  
Recognition Systems ◽  
Human Ear

The performance of Mel scale and Bark scale is evaluated for text-independent speaker identification system. Mel scale and Bark scale are designed according to human auditory system. The filter bank structure is defined using Mel and Bark scales for speech and speaker recognition systems to extract speaker specific speech features. In this work, performance of Mel scale and Bark scale is evaluated for text-independent speaker identification system. It is found that Bark scale centre frequencies are more effective than Mel scale centre frequencies in case of Indian dialect speaker databases. Mel scale is defined as per interpretation of pitch by human ear and Bark scale is based on critical band selectivity at which loudness becomes significantly different. The recognition rate achieved using Bark scale filter bank is 96% for AISSMSIOIT database and 95% for Marathi database.

scholarly journals Unified FRM‐based complex modulated filter bank structure with low complexity

2018 ◽  
Vol 54 (1) ◽  
pp. 18-20 ◽  
Author(s):  
Wenxu Zhang ◽  
Qiuying Du ◽  
Qingbo Ji ◽  
Tao Chen
Keyword(s):  
Filter Bank ◽  
Low Complexity ◽  
Bank Structure

A 0.4–3-GHz nested bandpass filter and a 1.1–1.7-GHz balun bandpass filter using tunable band-switching technique

2017 ◽  
Vol 9 (6) ◽  
pp. 1279-1291 ◽  
Author(s):  
Keiichi Motoi ◽  
Naoki Oshima ◽  
Masaki Kitsunezuka ◽  
Kazuaki Kunihiro
Keyword(s):  
Software Defined Radio ◽  
Filter Bank ◽  
Tuning Range ◽  
Bandpass Filter ◽  
Rf Mems ◽  
Fine Tuning ◽  
Rf Switches ◽  
Tunable Capacitors ◽  
Continuous Tuning ◽  
Bank Structure

This paper presents a second-order tunable single-ended (unbalanced) bandpass filter (BPF) with continuous 0.4–3-GHz coverage and a tunable balun BPF with continuous 1.1–1.7-GHz coverage for software-defined radio transceivers with the use of band-switchable and radio frequency (RF)-micro-electromechanical systems (MEMS)-tuned resonators. The BPFs are realized with two pairs of RF switches for coarse-tuning and RF-MEMS-tunable capacitors for fine-tuning. On the one hand, for the tunable single-ended BPF, a transition between three bands is enabled using two pairs of RF switches. On the other hand, for the tunable balun BPF, a transition between two bands is enabled using one pair of RF switches. Furthermore, the three-band switchable single-ended BPF is constructed in a nested two-filter bank structure for expanding the tuning range without increasing the footprint. In addition, to complement the discrete band gaps, RF-MEMS capacitor-tuned resonators are used, and a continuous tuning range of nearly the entire ultra-high-frequency band is achieved. The filter bank is fabricated on a Duroid substrate with εr = 3.5 and h = 0.787 mm. The filter bank has an insertion loss of 3.2–6.8 dB and a 1-dB bandwidth of 65–450 MHz with a continuous tuning range of 0.4–3 GHz.

Sign in / Sign up

Export Citation Format

Share Document