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Add updated noise equation for glwe keyswitch

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This commit is contained in:
Pro7ech
2025-11-17 16:48:00 +01:00
parent 84adaa4a83
commit 923db5e715
1 changed files with 26 additions and 0 deletions
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26
poulpy-core/src/noise/mod.rs
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@@ -38,6 +38,32 @@ pub(crate) fn var_noise_gglwe_product(
noise
}
#[allow(clippy::too_many_arguments)]
#[allow(dead_code)]
pub(crate) fn var_noise_gglwe_product_v2(
n: f64,
logq: usize,
dnum: usize,
dsize: usize,
base2k: usize,
var_xs: f64,
var_msg: f64,
var_a_err: f64,
var_gct_err_lhs: f64,
var_gct_err_rhs: f64,
rank_in: f64,
) -> f64 {
let base: f64 = ((dsize * base2k) as f64).exp2();
let var_base: f64 = base * base / 12f64;
let scale: f64 = (logq as f64).exp2();
let mut noise: f64 = (dnum as f64) * n * var_base * (var_gct_err_lhs + var_xs * var_gct_err_rhs);
noise += var_msg * var_a_err * var_base * n;
noise *= rank_in;
noise /= scale * scale;
noise
}
#[allow(clippy::too_many_arguments)]
#[allow(dead_code)]
pub(crate) fn log2_std_noise_gglwe_product(